[519]*519Me. Chief Justice Hughes
delivered the opinion of the Court.
Petitioners in No. 854 were convicted in the District Court of the United States for the Eastern District of New York on eighteen counts of an indictment charging violations of what is known as the “ Live Poultry Code,” 1 and on an additional count for conspiracy to commit such violations.2 By demurrer to the indictment and appropriate motions on the trial, the defendants contended (1) that the Code had been adopted pursuant to an unconstitutional delegation by Congress of legislative power; (2) that it attempted to regulate intrastate transactions which lay outside the authority of Congress; and (3) that in certain provisions it was repugnant to the due process clause of the Fifth Amendment.
[520]*520The Circuit Court of Appeals sustained the conviction on the conspiracy count and on sixteen counts for violation of the Code, but reversed the conviction on two counts which charged violation of requirements as to minimum wages and maximum hours of labor, as these were not deemed to be within the congressional power of regulation. On the respective applications of the defendants (No. 854) and of the Government (No. 864) this Court granted writs of certiorari, April 15, 1935.
■ New York City is the largest live-poultry market in the United. States. Ninety-six per cent, of the live poultry there marketed comes from other States. Three-fourths of this amount arrives by rail and is consigned to commission men or receivers. Most of these freight shipments (about 75 per cent.) come in at the Manhattan Terminal of the New York Central Railroad, and the remainder at one of the four terminals in New Jersey serving New York City. The commission men transact by far the greater part of the business on a commission basis, representing the shippers as’ agents, and remitting to them the proceeds of sale, less commissions, freight and handling charges. Otherwise, they buy for their own account. They sell to slaughterhouse operators who are also called market-men.
The defendants are slaughterhouse operators of the latter class. A. L. A. Schechter Poultry Corporation and Schechter Live Poultry Market are corporations conducting wholesale poultry slaughterhouse markets in Brooklyn, New York City. Joseph Schechter operated the latter corporation and also guaranteed the credits of the former corporation which was operated by Martin, Alex and Aaron Schechter. Defendants ordinarily purchase their live poultry from commission men at the West Washington Market in New York City or at the railroad terminals serving the City, but occasionally they purchase from commission men in Philadelphia. They buy the [521]*521poultry for slaughter and resale. After the poultry is trucked to their slaughterhouse markets in Brooklyn, it is there sold, usually within twenty-four hours, to retail poultry dealers and butchers who sell directly to consumers. The poultry purchased from defendants is immediately slaughtered, prior to delivery, by shochtim in defendants’ employ. Defendants do not sell poultry in interstate commerce.
The “ Live Poultry Code ” was promulgated under § 3 of the National Industrial Recovery Act.3 That section— the pertinent provisions of which are set forth in the margin4 — authorizes the President to approve “ codes of [522]*522fair competition.” Such a code may be approved for a trade or industry, upon application by one or more trade or industrial associations or groups, if the President finds (1) that such associations or groups “impose no inequitable restrictions on admission to membership therein and are truly representative,” and (2) that such codes are not designed “ to promote monopolies or to eliminate or oppress small enterprises and will not operate to discrimi[523]*523nate against them, and will tend to effectuate the policy ” of Title I of the- Act. Such codes “ shall not permit monopolies or monopolistic practices.” As a condition of his approval, the President may “ impose such conditions (including requirements for the making of reports and the keeping of accounts) for the protection of consumers, competitors, employees, and others, and in furtherance of the public interest, and may provide such exceptions to and exemptions from the provisions of such code as the President in his discretion deems necessary to effectuate the policy herein declared.” Where such a code has not been approved, the President may prescribe one, either on his own motion or on complaint. Violation of any provision of a code (so approved or prescribed) “ in any transaction in or affecting interstate or foreign commerce ” is made a misdemeanor punishable by a fine of not more than $500 for each offense, and each day the violation continues is to be deemed a separate offense.
The “ Live Poultry Code ” was approved by the President on April 13, 1934. Its divisions indicate its nature and scope. The Code has eight articles entitled (1) purposes, (2) definitions, (3) hours, (4) wages, (5) general labor provisions, (6) administration, (7) trade practice provisions, and (8) general.
The declared purpose is “ To effect the policies of title I of the National Industrial Recovery Act.” The Code is established as “ a code of fair competition for the live poultry industry of the metropolitan area in and about the City of New York.” That area is described as embracing the five boroughs of New York City, the counties of Rockland, Westchester, Nassau and Suffolk in the State of New York, the counties of Hudson and Bergen in the State of New Jersey, and the county of Fairfield in the State of Connecticut.
The “ industry ” is defined as including “ every person engaged in the business of selling, purchasing for re[524]*524sale, transporting, or handling and/or slaughtering live poultry, from the time such poultry comes into the New York metropolitan area to the time it is first sold in slaughtered form,” and such “ related branches ” as may from time to time be included by amendment. Employers are styled “ members of the industry,” and the term employee is defined to embrace “ any and all persons engaged in the industry, however compensated,” except “members.”
The Code fixes the number of hours for work-days. It provides that no employee, with certain exceptions, shall be permitted to work in excess of forty (40) hours in any one week, and that no employee, save as stated, “ shall be paid in any pay period less than at the rate of fifty (50) cents per hour.” The article containing “ general labor provisions ” prohibits the employment of any person under sixteen years of age, and declares that employees shall have the right of “ collective bargaining,” and freedom of choice with respect to labor organizations, in the terms of § 7 (a) of the Act. The minimum number of employees, who shall be employed by slaughterhouse operators, is fixed,.the number being graduated according to the average volume of weekly sales.
Provision is made for administration through an “ industry advisory committee,” to be selected by trade associations and members of the industry, and a “ code supervisor ” to be appointed, with the approval of the committee, by agreement between the Secretary of Agriculture and the Administrator for Industrial Recovery. The expenses of administration are to be borne by the members of the industry proportionately upon the basis of volume of business, or such other factors as the advisory committee may deem equitable, “subject to the disapproval of the Secretary and/or Administrator.”
The seventh article, containing “ trade practice provisions,” prohibits various practices which are said to consti[525]*525tute “ unfair methods of competition.” The final article provides for verified reports, such as the Secretary or Administrator may require, “(1) for the protection of consumers, competitors, employees, and others, and in furtherance of the public interest, and (2) for the determination by the Secretary or Administrator of the extent to which the declared policy of the act is being effectuated by this code.” The members of the industry are also required to keep books and records which “will clearly reflect all financial transactions of their respective businesses and the financial condition thereof,” and to submit weekly reports showing the range of daily prices and volume of sales ” for each kind of produce.
The President approved the Code by an executive order in which he found that the application for his approval had been duly made in accordance with the provisions of Title I of the National Industrial Recovery Act, that there had been due notice and hearings, that the Code constituted “ a code of fair competition ” as contemplated by the Act and complied with its pertinent provisions including clauses (1) and (2) of subsection (a) of § 3 of Title I; and that the Code would tend “ to effectuate the policy of Congress as declared in section 1 of Title I.” 5
[526]*526The executive order also recited that the Secretary of Agriculture and the Administrator of the National Industrial Recovery Act had rendered separate reports as to the provisions within their respective jurisdictions. The Secretary of Agriculture reported that the provisions of the Code “ establishing standards of fair competition (a) are regulations of transactions in or affecting the current of interstate and/or foreign commerce and (b) are reason[527]*527able,” and also that the Code would tend to effectuate the policy declared in Title I of the Act, as set forth in § 1. The report of the Administrator for Industrial Recovery dealt with wages, hours of labor and other labor provisions.6
Of the eighteen counts of the indictment upon which the defendants were convicted, aside from the count for conspiracy, two counts charged violation of the minimum wage and maximum hour provisions of the Code, and ten counts were for violation of the requirement (found in the “ trade practice provisions ”) of “ straight killing.” This requirement was really one of “ straight ” selling. The term “ straight killing ” was defined in the Code as “ the practice of requiring persons purchasing poultry for resale to accept the run of any half coop, coop, or coops, as purchased by slaughterhouse operators, except for culls.” 7 The charges in the ten counts, respectively, were [528]*528that the defendants in selling to retail dealers and butchers had permitted “ selections of individual chickens taken from particular coQps and half coops.”
Of the other six counts, one charged the sale to a butcher of an unfit chicken; two counts charged the making of sales without having the poultry inspected or approved in accordance with regulations or ordinances of the City of New York; two counts charged the making of false reports or the failure to make reports relating to the range of daily prices and volume of sales for certain periods; and the remaining count was for sales to slaughterers or dealers who were without licenses required by the ordinances and regulations of the city of New York.
First. Two preliminary points are stressed by the Government with respect to the appropriate approach to the important questions presented. We are told that the provision of the statute authorizing the adoption of codes must be viewed in the light of the grave national crisis with which Congress was confronted. Undoubtedly, the conditions to which power is addressed are always to be considered when the exercise of power is challenged. Extraordinary conditions may call for extraordinary remedies. But the argument necessarily stops short of an attempt to justify action which lies outside the sphere of constitutional authority. Extraordinary conditions do not create or enlarge constitutional power.8 The Constitution established a national government with powers deemed to be adequate, as they have proved to be both in war and peace, but these powers of the national government are limited by the constitutional grants. Those who act under these grants are not at liberty to transcend the [529]*529imposed limits because they believe that more or different power is necessary. Such assertions of extra-constitutional authority were anticipated and precluded by the explicit terms of the Tenth Amendment, — “The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.”
The further point is urged that the national crisis demanded a broad and intensive cooperative effort by those engaged in trade and industry, and that this necessary cooperation was sought to be fostered by permitting them to initiate the adoption of codes. But the statutory plan is not simply one for voluntary effort. It does not seek merely to endow voluntary trade or industrial associations or groups with privileges or immunities. It involves the coercive exercise of the law-making power. The codes of fair competition which the statute attempts to authorize are codes of laws. If valid, they place all persons within their reach under the obligation of positive law, binding equally those who assent and those who do not assent. Violations of the provisions of the codes are punishable as crimes.
Second. The question of the delegation of legislative power. We recently had occasion to review the pertinent decisions and the general principles which govern the determination of this question. Panama Refining Co. v. Ryan, 293 U. S. 388. The Constitution provides that “All legislative powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives.” Art I, § 1. And the Congress is authorized “ To make all laws which shall be necessary and proper for carrying into execution ” its general powers. Art. I, § 8, par. 18. The Congress is not permitted to abdicate or to transfer to others the essential legislative functions with which it is thus vested. We have repeatedly recognized the necessity of adapting [530]*530legislation to complex conditions involving a host of details with which the national legislature cannot deal directly. We pointed out in the Panama Company case that the Constitution has never been regarded as denying to Congress the necessary resources of flexibility and practicality, which will enable it to perform its function in laying down policies and establishing standards, while leaving to selected instrumentalities the making of subordinate rules within prescribed limits and the determination of facts to which the policy as declared by the legislature is to apply. But we said that the constant recognition of the necessity and validity of such provisions, and the wide range of administrative authority which has. been developed by means of them, cannot be allowed to obscure the limitations of the authority to delegate, if our constitutional system is to be maintained. Id., p. 421.
Accordingly, we look to the statute to see whether Congress has overstepped these limitations, — whether Congress in authorizing “ codes of fair competition ” has itself established the standards of legal obligation, thus performing its essential legislative function, or, by the failure to enact such standards, has attempted to transfer that function to others.
The aspect in which the question is now presented is distinct from that which was before us in the case of the Panama Company. There, the subject of the statutory prohibition was defined. National Industrial Recovery Act, § 9 (c). That subject was the transportation in interstate and foreign commerce of petroleum and petroleum products which are produced or withdrawn from storage in excess of the amount permitted by state authority. The question was with respect to the range of discretion given to the President in prohibiting that transportation. Id., pp. 414, 415, 430. As to the “ codes of fair competition,” under § 3 of the Act, the question is more funda[531]*531mental. It is whether there is any adequate definition of the subject to which the codes are to be addressed.
What is meant by “ fair competition ” as the term is used in the Act? Does it refer to a category established in the law, and is the authority to make codes limited accordingly? Or is it used as a convenient designation for whatever set of laws the formulators of a code for a particular trade or industry may propose and the President may approve (subject to certain restrictions), or the President may himself prescribe, as being wise and beneficent provisions for the government of the trade or industry in order to accomplish the broad purposes of rehabilitation, correction and expansion which are stated in the first section of Title I?9
The Act does not define “ fair competition.” “ Unfair competition,” as known to the common law, is a limited concept. Primarily, and strictly, it relates to the palming off of one’s goods as those of a rival trader. Goodyear Manufacturing Co. v. Goodyear Rubber Co., 128 U. S. 598, [532]*532604; Howe Scale Co. v. Wyckoff, Seamans & Benedict, 198 U. S. 118, 140; Hanover Milling Co. v. Metcalf, 240 U. S. 403, 413. In recent years, its scope has been extended. It has been held to apply to misappropriation as well as misrepresentation, to the selling of another’s goods as one’s own, — to misappropriation of what equitably belongs to a competitor. International News Service v. Associated Press, 248 U. S. 215, 241, 242. Unfairness in competition has been predicated of acts which lie outside the ordinary course of business and are tainted by fraud, or coercion, or conduct otherwise prohibited by law.10 Id., p. 258. But it is evident that in its widest range, “ unfair competition,” as it has been understood in the law, does not reach the objectives of the codes which are authorized by the National'Industrial Recovery Act. The codes may, indeed, cover conduct which existing law condemns, but they are not limited to conduct of that sort. The Government does not contend that the Act contemplates such a limitation. It would be opposed both to the declared purposes of the Act and to its administrative construction.
The Federal Trade Commission Act (§ 5) 11 introduced the expression “unfair methods of competition,” which were declared to be unlawful. That was an expression new in the law. Debate apparently convinced the sponsors of the legislation that the words “ unfair competition,” in the light of their meaning at common law, were too narrow. We have said that the substituted phrase has a broader meaning, that it does not admit of precise definition, its scope being left to judicial determination as controversies arise. Federal Trade Comm’n v. Raladam Co., 283 U. S. 643, 648, 649; Federal Trade Comm’n v. Keppel & Bro., 291 U. S. 304, 310-312. What are [533]*533“ unfair methods of competition ” are thus to be determined in particular instances, upon evidence, in the light of particular competitive conditions and of what is found to be a specific and substantial public interest. Federal Trade Comm’n v. Beech-Nut Packing Co., 257 U. S. 441, 453; Federal Trade Comm’n v. Klesner, 280 U. S 19, 27, 28; Federal Trade Comm’n v. Raladam Co., supra; Federal Trade Comm’n v. Keppel & Bro., supra; Federal Trade Comm’n v. Algoma Lumber Co., 291 U. S. 67, 73. To make this possible, Congress set up a special procedure. A Commission, a quasi-judicial body, was created. Provision was made for formal complaint, for notice and hearing, for appropriate findings of fact supported by adequate evidence, and for judicial review to give assurance that the action of the Commission is taken within its statutory authority. Federal Trade Comm’n v. Raladam Co., supra; Federal Trade Comm’n v. Klesner, supra.12
In providing for codes, the National Industrial Recovery Act dispenses with this administrative procedure and with any administrative procedure of an analogous character. But the difference between the code plan of the Recovery Act and the scheme of the Federal Trade Commission Act lies not only in procedure but in subject [534]*534matter. We cannot regard the “ fair competition ” of the codes as antithetical to the “ unfair methods of competition ” of the Federal Trade Commission Act. The “ fair competition of the codes has a much broader range and a new significance. The Recovery Act provides that it shall not be construed to impair the powers of the Federal Trade Commission, but, when a code is approved, its provisions are to be the “ standards of fair competition ” for the trade or industry concerned, and any violation of such standards in any transaction in or affecting interstate or foreign commerce is to be deemed “ an unfair method of competition ” within the meaning of the Federal Trade Commission Act. § 3 (b).
For a statement of the authorized objectives and content of the “ codes of fair competition ” we are referred repeatedly to the “ Declaration of Policy ” in section one of Title I of the Recovery Act. Thus, the approval of a code by the President is conditioned on his finding that it “will tend to effectuate the policy of this title.” § 3 (a). The President is authorized to impose such conditions “ for the protection of consumers, competitors, employees, and others, and in furtherance of the public interest, and may provide such exceptions to and exemptions from the provisions of such code as the President in his discretion deems necessary to effectuate the policy herein declared.” Id. The “ policy herein declared ” is manifestly that set forth in section one. That declaration embraces a broad range of objectives. Among them we find the elimination of “ unfair competitive practices.” But even if this clause were to be taken to relate to practices which fall under the ban of existing law, either common law or statute, it is still only one of the authorized aims described in section one. It is there declared to be “ the policy of Congress ”—
“ to remove obstructions to the free flow of interstate and foreign commerce which tend to diminish the amount [535]*535thereof; and to provide for the general welfare by promoting the organization of industry for the purpose of cooperative action among trade groups, to induce and maintain united action of labor and management under adequate-governmental sanctions and supervision, to eliminate unfair competitive practices, to promote the fullest possible utilization of the present productive capacity of industries, to avoid undue restriction of production (except as may be temporarily required), to increase the consumption of industrial and agricultural products by increasing purchasing power, to reduce and relieve unemployment, to improve standards of labor, and otherwise to rehabilitate industry and to conserve natural resources.”13
Under § 3, whatever “ may tend to effectuate ” these general purposes may be included in the “ codes of fair competition.” We think the conclusion is inescapable that the authority sought to be conferred by § 3 was not merely to deal with “ unfair competitive practices ” which offend against existing law, and could be the subject of judicial condemnation without .further legislation, or to create administrative machinery for the application of established principles of law to particular instances of violation. Rather, the purpose is clearly disclosed to authorize new and controlling prohibitions through codes of laws which would embrace what the formulators would propose, and what the President would approve, or prescribe, as wise and beneficient measures for the government of trades and industries in order to bring about their rehabilitation, correction and development, according to the general declaration of policy in séction one. Codes of laws of this sort are styled “ codes of fair competition.” We find no real controversy upon this point and we must determine the validity of the Code in question in this aspect. As the Government candidly says in its [536]*536brief: “ The words ‘ policy of this title ’ clearly refer to the ‘policy’ which Congress declared in the section entitled ‘Declaration of Policy’ — § 1. All of the policies there set forth point toward a single goal — the rehabilitation of industry and the industrial recovery which unquestionably was the major policy of Congress in adopting the National Industrial Recovery Act.” And that this is the controlling purpose of the Code now before us appears both from its repeated declarations to that effect and from the scope of its requirements. It will be observed that its provisions as to the hours and wages of employees and its “ general labor provisions ” were placed in separate articles, and these were not included in the article on “ trade practice provisions ” declaring what should be deemed to constitute “ unfair methods of competition.” The Secretary of Agriculture thus stated the objectives of the Live Poultry Code in his report to the President, which was recited in the executive order of approval:
“ That said code will tend to effectuate the declared policy of title I of the National Industrial Recovery Act as set forth in section 1 of said act in that the terms and provisions of such code tend to: (a) Remove obstructions to the free flow of interstate and foreign commerce which tend to diminish the amount thereof; (b) to provide for the general welfare by promoting the organization of industry for the purpose of cooperative action among trade groups; (c) to eliminate unfair competitive practices; (d) to promote the fullest possible utilization of the present productive capacity of industries; (e) to avoid undue restriction of production (except as may be temporarily required) ; (f) to increase the consumption of industrial and agricultural products by increasing purchasing power; and (g) otherwise to rehabilitate industry and to conserve natural resources.”
[537]*537The Government urges that the codes will “ consist of rules of competition deemed fair for each industry by representative members of that industry — by the persons most vitally concerned and most familiar with its problems.” Instances are cited in which Congress has availed itself of such assistance; as e. g., in the exercise of its authority over the public domain, with respect to the recognition of local customs or rules of miners as to mining claims,14 or, in matters of a more or less technical nature, as in designating the standard height of draw-bars.15 But would it be seriously contended that Congress could delegate its legislative authority to trade or industrial associations or groups so as to empower them to enact the laws they deem to be wise and beneficent for the rehabilitation ,and expansion of their trade or industries? Could trade or industrial associations or groups be constituted legislative bodies for that purpose because such associations or groups are familiar with the problems of their enterprises? And, could an effort of that sort be made valid by such a preface of generalities as to permissible aims as we find in section 1 of title I? The answer is obvious. Such a delegation of legislative power is unknown to our law and is utterly inconsistent with the constitutional prerogatives and duties of Congress.
The question, then, turns upon the authority which § 3 of the Recovery Act vests in the President to approve or prescribe. If the codes have standing as penal statutes, this must be due to the effect of the executive action. But Congress cannot delegate legislative power to the President to exercise an unfettered discretion to make [538]*538whatever laws he thinks may be needed or advisable for the rehabilitation and expansion of trade or industry. See Panama Refining Co. v. Ryan, supra, and cases there reviewed.
Accordingly we turn to the Recovery Act to ascertain what limits have been set to the exercise of the President’s discretion. First, the President, as a condition of approval, is required to find that the trade or industrial associations or groups which propose a code, “ impose no inequitable restrictions on admission to membership ” and are “truly representative.” That condition, however, relates only to the status of the-initiators of the new laws and not to the permissible scope of such laws. Second, the President is required to find that the code is not “ designed to promote monopolies or to eliminate or oppress small enterprises and will not operate to discriminate against them.” And, to this is added a proviso that the code “shall not permit monopolies or monopolistic practices.” But these restrictions leave virtually untouched the field of policy envisaged by section one, and, in that wide field of legislative possibilities, the proponents of a code, refraining from monopolistic designs, may roam at will and the President may approve or disapprove their proposals as he may see fit. That is the precise effect of the further finding that the President is to make— that the code “will tend to effectuate the policy of this title.” While this is called a finding, it is really but a statement of an opinion as to the general effect upon the promotion of trade or industry of a scheme of laws. These are the only findings which Congress has made essential in order to put into operation a legislative code having the aims described in the “ Declaration of Policy.”
Nor is the breadth of the President’s discretion left to the necessary implications of this limited requirement as to his findings. As already noted, the President in approving a code may impose his own conditions, adding to [539]*539or taking from what is proposed, as “ in his discretion ” he thinks necessary “ to effectuate the policy ” declared by the Act. Of course, he has no less liberty when he prescribes a code on his own motion or on complaint, and he is free to prescribe one if a code has not been approved. The Act provides for the creation by the President of administrative agencies to assist him, but the action or reports of such agencies, or of his other assistants, — their recommendations and findings in relation to the making of codes — have no sanction beyond the will of the President, who may accept, modify or reject them as he pleases. Such recommendations or findings in no way limit the authority which § 3 undertakes to vest in the President with no other conditions than those there specified. And this authority relates to a host of different trades and industries, thus extending the President’s discretion to all the varieties of laws which he may deem to be beneficial in dealing with the vast array of commercial and industrial activities throughout the country.
Such a sweeping delegation of legislative power finds no support in the decisions upon which the Government especially relies. By the Interstate Commerce Act, Congress has itself provided a code of laws regulating the activities of the common carriers subject to the Act, in order to assure the performance of their services upon just and reasonable terms, with adequate facilities and without unjust discrimination. Congress from time to time has elaborated its requirements, as needs have been disclosed. To facilitate the application of the standards prescribed by the Act, Congress has provided an expert body. That administrative agency, in dealing with particular cases, is required to act upon notice and hearing, and its orders must be supported by findings of fact which in turn are sustained by evidence. Interstate Commerce Comm’n v. Louisville & Nashville R. Co., 227 U. S. 88; Florida v. United States, 282 U. S. 194; United States [540]*540v. Baltimore & Ohio R. Co., 293 U. S. 454. When the Commission is authorized to issue, for the construction, extension or abandonment of lines, a certificate of “ public convenience and necessity,” or to permit the acquisition by one carrier of the control of another, if that is found to be “ in the public interest,” we have pointed out that these provisions are not left without standards to guide determination. The authority conferred has direct relation to the standards prescribed for the service of common carriers and can be exercised only upon findings, based upon evidence, with respect to particular conditions of transportation. New York Central Securities Co. v. United States, 287 U. S. 12, 24, 25; Texas & Pacific Railway Co. v. Gulf, Colorado & Santa Fe Ry. Co., 270 U. S. 266, 273; Chesapeake & Ohio Ry. Co. v. United States, 283 U. S. 35, 42.
Similarly, we have held that the Radio Act of 192716 established standards to govern radio communications and, in view of the limited number of available broadcasting frequencies, Congress authorized allocation and licenses. The Federal Radio Commission was created as the licensing authority, in order to secure a reasonable equality of opportunity in radio transmission and reception. The authority of the Commission to grant licenses “ as public convenience, interest or necessity requires ” was limited by the nature of radio communications, and by the scope, character ,and quality of the services to be rendered and the relative advantages to be derived through distribution of facilities. These standards established by Congress were to be enforced upon hearing, and evidence, by an administrative body acting under statutory restrictions adapted to the particular activity. Federal Radio Comm’n v. Nelson Brothers Co., 289 U. S. 266.
[541]*541In Hampton & Co. v. United States, 276 U. S. 394, the question related to the “ flexible tariff provision ” of the Tariff Act of 1922.17 We held that Congress had described its plan “ to secure by law the imposition of customs duties on articles of imported merchandise which should equal the difference between the cost of producing in a foreign country the articles in question and laying them down for sale in the United States, and the cost of producing and selling like or similar articles in the United States.” As the differences in cost might vary from time to time, provision was made for the investigation and determination of these differences by the executive branch so as to make “ the adjustments necessary to conform the duties to the standard underlying that policy and plan.” Id., pp. 404, 405. The Court found the same principle to be applicable in fixing customs duties as that which permitted Congress to exercise its rate-making power in interstate commerce, “ by declaring the rule which shall prevail in the legislative fixing of rates ” and then remitting “ the fixing of such rates ” in accordance with its provisions “ to a rate-making body.” Id., p. 409. The Court fully recognized the limitations upon the delegation of legislative power. Id., pp. 408-All.
To summarize and conclude upon this point: Section 3 of the Recovery Act is without precedent. It supplies no standards for any trade, industry or activity. It does not undertake to prescribe rules of conduct to be applied to particular states of fact determined by appropriate administrative procedure. Instead of prescribing rules of conduct, it authorizes the making of codes to prescribe them. For that legislative undertaking, § 3 sets up no standards, aside from the statement of the general aims of rehabilitation, correction and expansion described in section one. In view of the scope of that broad declaration, and of the [542]*542nature of the few restrictions that are imposed, the discretion of the President in approving or prescribing codes, and thus enacting laws for the government of trade and industry throughout the country, is virtually unfettered. We think that the code-making authority thus conferred is an unconstitutional delegation of legislative power.
Third. The question of the application of the provisions of the Live Poultry Code to intrastate transactions. Although the validity of the codes (apart from the question of delegation) rests upon the commerce clause of the Constitution, § 3 (a) is not in terms limited to interstate and foreign commerce. From the generality of its terms, and from the argument of the Government at the bar, it would appear that § 3 (a) was designed to authorize codes without that limitation. But under § 3 (f) penalties are confined to violations of a code provision “ in any transaction in or affecting interstate or foreign commerce.” This aspect of the case presents the question whether the particular provisions of the Live Poultry Code, which the defendants were convicted for violating and for having conspired to violate, were within the regulating power of Congress.
■ These provisions relate to the hours and wages of those employed by defendants in their slaughterhouses in Brooklyn and to the sales there made to retail dealers and butchers.
(1) Were these transactions “in” interstate commerce? Much is made of the fact that almost all the poultry coming to New York is sent there from other States. But the code provisions, as here applied, do> not concern the transportation of the poultry from other States to New York, or the transactions of the commission men or others to whom it is consigned, or the sales made by such consignees to■ defendants. When defendants had made their purchases, whether at the West Washington Market in New York City or at the railroad [543]*543terminals serving the City, or elsewhere, the poultry was trucked to their slaughterhouses in Brooklyn for local disposition. The interstate transactions in relation to that poultry then ended. Defendants held the poultry at their slaughterhouse markets for slaughter and local sale to retail dealers and butchers who in turn sold directly to consumers. Neither the slaughtering nor the sales by defendants were transactions in interstate commerce. Brown v. Houston, 114 U. S. 622, 632, 633; Public Utilities Comm’n v. London, 249 U. S. 236, 245; Industrial-Association v. United States, 268 U. S. 64, 78, 79; Atlantic Coast Line v. Standard Oil Co., 275 U. S. 257, 267.
The undisputed facts thus afford no warrant for the argument that the poultry handled by defendants at their slaughterhouse markets was in a “ current ” or “ flow ” of interstate commerce and was thus subject to congressional regulation. The mere fact that there may be a constant flow of commodities into a State does not mean that the flow continues after the property has arrived and has become commingled with the mass of property within the State and is there held solely for local disposition and use. So far as the poultry here in question is concerned, the flow in interstate commerce had ceased. The poultry had come to a permanent rest within the State. It was not held, used, or sold by defendants in relation to any further transactions in interstate commerce and was not destined for transportation to other States. Hence, decisions which deal with a stream of interstate commerce — where goods come to rest within a State temporarily and are later to go forward in interstate commerce — and with the regulations of transactions involved in that practical continuity of movement, are not applicable here. See Swift & Co. v. United States, 196 U. S. 375, 387, 388; Lemke v. Farmers Grain Co., 258 U. S. 50, 55; Stafford v. Wallace, 258 U. S. 495, 519; Chi[544]*544cago Board of Trade v. Olsen, 262 U. S. 1, 35; Tagg Bros. & Moorhead v. United States, 280 U. S. 420, 439.
(2) Did the defendants’ transactions directly “ affect ” interstate commerce so as to be subject to federal regulation? The power of Congress extends not only to the regulation of transactions which are part of interstate commerce, but to the protection of that commerce from injury. It matters not that the injury may be due to the conduct of those engaged in intrastate operations. Thus, Congress may protect the safety of those employed in interstate transportation “ no matter what may be the source of the dangers which threaten it.” Southern Ry. Co. v. United States, 222 U. S. 20, 27. We said in Second Employers’ Liability Cases, 223 U. S. 1, 51, that it is the “ effect upon interstate commerce,” not “ the source of the injury,” which is “the criterion of congressional power.” We have held that, in dealing with common carriers engaged in both interstate and intrastate commerce, the dominant authority of Congress necessarily embraces the right to control their intrastate operations in all matters having such a close and substantial relation to interstate traffic that the control is essential or appropriate to secure the freedom of that traffic from interference or unjust discrimination and to promote the efficiency of the interstate service. The Shreveport Case, 234 U. S. 342, 351, 352; Wisconsin Railroad Comm’n v. Chicago, B. & Q. R. Co., 257 U. S. 563, 588. And combinations and conspiracies to restrain interstate commerce, or to monopolize any part of it, are none the less within the reach of the Anti-Trust Act because the conspirators seek to attain their end by means of intrastate activities. Coronado Coal Co. v. United Mine Workers, 268 U. S. 295, 310; Bedford Cut Stone Co. v. Stone Cutters Assn., 274 U. S. 37, 46.
• We recently had occasion, in Local 167 v. United States, 291 U. S. 293, to apply this principle in connection with [545]*545the live poultry industry. That was a suit to enjoin a conspiracy to restrain and monopolize interstate commerce in violation of the Anti-Trust Act. It was shown that marketmen, teamsters and slaughterers (shochtim) had conspired to burden the free movement of live poultry into the metropolitan area in and about New York City. Marketmen had organized an association, had allocated retailers among themselves, and had agreed to increase prices. To accomplish their objects, large amounts of money were raised by levies upon poultry sold, men were hired to obstruct the business of dealers who resisted, wholesalers and retailers were spied upon ,and by violence and other forms of intimidation were prevented from freely purchasing live poultry. Teamsters refused to handle poultry for recalcitrant marketmen and members of the shochtim union refused to slaughter. In view of the proof of that conspiracy, we said that it was unnecessary to decide when interstate commerce ended and when intrastate commerce began. We found that the proved interference by the conspirators “ with the unloading, the transportation, the sales by marketmen to retailers, the prices charged and the amount of profits exacted ” operated “ substantially ,and directly to restrain and burden the untrammeled shipment and movement of the poultry ” while unquestionably it was in interstate commerce. The intrastate acts of the conspirators were included in the injunction because that was found to be necessary for the protection of interstate commerce against the attempted and illegal restraint. Id., pp. 297, 299, 300.
The instant case is not of that sort. This is not a prosecution for a conspiracy to restrain or monopolize interstate commerce in violation of the Anti-Trust Act. Defendants have been convicted, not upon direct charges of injury to interstate commerce or of interference with persons engaged in that commerce, but of violations of certain provisions of the Live Poultry Code and of con[546]*546spiracy to commit these violations. Interstate commerce is brought in only upon the charge that violations of these provisions — as to hours and wages of employees and local sales — “affected” interstate commerce.
In determining how far the federal government may go in controlling intrastate transactions upon the ground that they “ affect ” interstate commerce, there is a necessary and well-established distinction between direct and indirect effects. The precise line can be drawn only as individual cases arise, but the distinction is clear in principle. Direct effects are illustrated by the railroad cases we have cited, as e. g., the effect of failure to use prescribed safety appliances on railroads which are the highways of both interstate and intrastate commerce, injury to an employee engaged in interstate transportation by •the negligence of an employee engaged in an intrastate movement, the fixing of rates for intrastate transportation which unjustly discriminate against interstate commerce. But where the effect of intrastate transactions upon interstate commerce is merely indirect, such transactions remain within the domain of state power. If the commerce clause were construed to reach all enterprises and transactions which could be said to have an indirect effect upon interstate commerce, the federal authority would embrace practically all the activities of the people and the authority of the State over its domestic concerns would exist only by sufferance of the federal government. Indeed, on such a theory, even the development of the State’s commercial facilities would be subject to federal control. As we said in the Minnesota Rate Cases, 230 U. S. 352, 410: “ In the intimacy of commercial relations, much that is done in the superintendence of local matters may have an indirect bearing upon interstate commerce. The development of local resources and the extension of local facilities may have a very important effect upon communities less favored and to an appreciable degree [547]*547alter the course of trade. The freedom of local trade may stimulate interstate commerce, while restrictive measures within the police power of the State enacted exclusively with respect to internal business, as distinguished from interstate traffic, may in their reflex or indirect influence diminish the latter and reduce the volume of articles transported into or out of the State.” See, also, Kidd v. Pearson, 128 U. S. 1, 21; Heisler v. Thomas Colliery Co., 260 U. S. 245, 259, 260.
The distinction between direct and indirect effects has been clearly recognized in the application of the AntiTrust Act. Where a combination or conspiracy is formed, with the intent to restrain interstate commerce or to monopolize any part of it, the violation of the statute is clear. Coronado Coal Co. v. United Mine Workers, 268 U. S. 295, 310. But where that intent is absent, and the objectives are limited to intrastate activities, the fact that there may be an indirect effect upon interstate commerce does not subject the parties to the federal statute, notwithstanding its broad provisions. This principle has frequently been applied in litigation growing out of labor disputes. United Mine Workers v. Coronado Coal Co., 259 U. S. 344, 410, 411; United Leather Workers v. Herkert & Meisel Trunk Co., 265 U. S. 457, 464-467; Industrial Association v. United States, 268 U. S. 64, 82; Levering & Garrigues Co. v. Morrin, 289 U. S. 103, 107, 108. In the case last cited we quoted with approval the rule that had been stated and applied in Industrial Association v. United States, supra, after review of the decisions, as follows: “ The alleged conspiracy and the acts here complained of, spent their intended and direct force upon a local situation, — for building is as essentially local as mining, manufacturing or growing crops, — and if, by a resulting diminution of the commercial demand, interstate trade was curtailed either generally or in specific instances, that was a fortuitous consequence so remote and indirect [548]*548as plainly to cause it to fall outside the reach of the Sherman Act.”
■ While these decisions related to the application of the federal statute, and not to its constitutional validity, the distinction between direct and indirect effects of intrastate transactions upon interstate commerce must be recognized as a fundamental one, essential to the maintenance of our constitutional system. Otherwise, as we have said, there would be virtually no limit to the federal power and for all practical purposes we should have a completely centralized government. We must consider the provisions here in question in the light of this distinction.
The question of chief importance relates to the provisions of the Code as to the hours and wages of those employed in defendants’ slaughterhouse markets. It is plain that these requirements are imposed in order to govern the details of defendants’ management of their local business. The persons employed in slaughtering and selling in local trade are not employed in interstate commerce. Their hours and wages have no direct relation to interstate commerce. The question of how many hours these employees should work and what they should be paid differs in no essential respect from similar questions in other local businesses which handle commodities brought into a State and there dealt in as a part of its internal commerce. This appears from an examination of the considerations urged by the Government with respect to conditions in the poultry trade. Thus, the Government argues that hours and wages affect prices; that slaughterhouse men sell at a small margin above operating costs; that labor represents 50 to 60 per cent, of these costs; that a slaughterhouse operator paying lower wages or reducing his cost by exacting long hours of work, translates his saving into lower prices; that this results in demands for a cheaper grade of goods; and that the cutting [549]*549of prices brings about a demoralization of the price structure. Similar conditions may be adduced in relation to other businesses. The argument of the Government proves too much. If the federal government may determine the wages and hours of employees in the internal commerce of a State, because of their relation to cost and prices and their indirect effect upon interstate commerce, it would seem that a similar control might be exerted over other elements of cost, also affecting prices, such as the number of employees, rents, advertising, methods of doing business, etc. All the processes of production and distribution that enter into cost could likewise be controlled. If the cost of doing an intrastate business is in itself the permitted object of federal control, the extent of the regulation of cost would be a question of discretion and not of power.
The Government also makes the point that efforts to enact state legislation establishing high labor standards have been impeded by the belief that unless similar action is taken generally, commerce will be diverted from the States adopting such standards, and that this fear of diversion has led to demands for federal legislation on the subject of wages and hours. The apparent implication is that the federal authority under the commerce clause should be deemed to extend to the establishment of rules to govern wages and hours in intrastate trade and industry generally throughout the country, thus overriding the authority of the States to deal with domestic problems arising from labor conditions in their internal commerce.
It is not the province of the Court to consider the economic advantages or disadvantages of such a centralized system. It is sufficient to say that the Federal Constitution does not provide for it. Our growth and development have called for wide use of the commerce power of the federal government in its control over the expanded activities of interstate commerce, and in protecting that [550]*550commerce from burdens, interferences, and conspiracies to restrain and monopolize it. But the authority of the federal government may not be pushed to such an extreme as to destroy the distinction, which the commerce clause itself establishes, between commerce “ among the several States ” and the internal concerns of a State. The same answer must be made to the contention that is based upon the serious economic situation which led to the passage of the Recovery Act, — the fall in prices, the decline in wages and employment, and the curtailment of the market for commodities. Stress is laid upon the great importance of maintaining wage distributions which would provide the necessary stimulus in starting “ the cumulative forces making for expanding commercial activity.” Without in any way disparaging this motive, it is enough to say that the recuperative efforts of the federal government must be made in a manner consistent with the authority granted by the Constitution.
We are of the opinion that the attempt through the provisions of the Code to fix the hours and wages of employees of defendants in their intrastate business was not a valid exercise of federal power.
The other violations for which defendants were convicted related to the making of local sales. Ten counts, for violation of the provision as to “ straight killing,” were for permitting customers to make “ selections of individual chickens taken from particular coops and half coops.” Whether or not this practice is good or bad for the local trade, its effect, if any, upon interstate commerce was only indirect. The same may be said of violations of the Code by intrastate transactions consisting of the sale “ of an unfit chicken ” and of sales which were not in accord with the ordinances of the City of New York. The requirement of reports as to prices and volumes of defendants’ sales was incident to the effort to control their intrastate business.
[551]*551In view of these conclusions, we find it unnecessary to discuss other questions which have been raised as to the validity of certain provisions of the Code under the due process clause of the Fifth Amendment.
On both the grounds we have discussed, the attempted delegation of legislative power, and the attempted regulation of intrastate transactions which affect interstate commerce only indirectly, we hold the code provisions here in question to be invalid and that the judgment of conviction must be reversed.
No. 854 — reversed.
No. 864 — affirmed.