OPINION
Before BOOCHEVER, C. J., and RABI-NO WITZ, CONNOR, ERWIN and BURKE, JJ.
CONNOR, Justice.
I
This case considers the constitutionality of the “Alaska Hire” law, AS 38.40. “Alas-. ka Hire,” enacted in 1972 and amended in 1976, requires that all oil and gas leases, easements or right-of-way permits for oil or gas pipelines, unitization agreements or any renegotiation of any of these to which the state is a party, contain a requirement that qualified Alaska residents be hired in preference to nonresidents. The statute does not apply to other private employment, nor to public employment.1 AS 38.40.090(1) defines a resident for these purposes as a person meeting five criteria there listed, of which the most important is that the person must have been physically present in the state, with certain exceptions, for one year.2
The law was not seriously enforced until 1975, when the state department of labor began issuing residency cards to those who met the statutory standards, and dispatching to pipeline jobs only persons with cards. This suit was filed shortly thereafter.
The eight plaintiffs, appellants here, include non-residents (some of whom- have worked on the oil pipeline in the past), persons who have been residents less than one year, and a life-long resident who is not considered a resident for Alaska Hire purposes since he was out of the state for [162]*162several months last year. The defendants and appellees are Edmund Orbeck, commissioner of labor, and Guy Richard Martin, commissioner of natural resources. They will be referred to as “the state.”
The plaintiffs make two major arguments: that the one-year durational residency requirement violates the state and federal equal protection clauses, and that any residency requirement violates the privileges and immunities clause of Article IV of the United States Constitution.3
By consent of the parties, consideration of the motion for preliminary injunction and of the merits was consolidated. The case was submitted on affidavits, depositions, and memoranda of law. No oral testimony was taken. On July 21, 1976, the superior court upheld the law in its entirety and entered judgment in favor of the defendant state officials. This appeal was filed the following day.
Preliminarily, the state asserts that the plaintiffs are not entitled to bring this suit because they lack standing and failed to exhaust their administrative remedies. We find these contentions without merit.
Five of the plaintiffs have sworn under oath that they are not residents of Alaska. Under AS 38.40.090(1)(D), they are not eligible to receive residency cards, and, since the department of labor cannot waive the statutory criteria, pursuit of administrative remedies would be useless. See Weinberger v. Salfi, 422 U.S. 749, 765, 95 S.Ct. 2457, 2466, 45 L.Ed.2d 522, 538-39 (1975); Pence v. Morton, 391 F.Supp. 1021, 1025 n. 3 (D.Alaska 1975), rev’d on other grounds (and this holding approved), 529 F.2d 135, 143 (9th Cir. 1976). Therefore, they have standing to challenge the residency requirement.
Plaintiffs Browning and Dorman are residents who have not lived in Alaska for one continuous year. Under the statute, they are ineligible for residency cards, and administrative remedies could not make them eligible. They therefore have standing to challenge the one-year residency requirement.4
Browning and Dorman executed their affidavits in May 1976. Since the preparation of the record on appeal, they may have met the one-year residency requirement. If so, the case is technically moot as to them. Nevertheless, we will address their contentions as though they were not moot, under the recognized exception to the mootness doctrine for cases “capable of repetition, yet evading review.” Southern Pacific Terminal Co. v. ICC, 219 U.S. 498, 515, 31 S.Ct. 279, 283, 55 L.Ed. 310, 316 (1911); see e. g., Dunn v. Blumstein, 405 U.S. 330, 333 n. 2, 92 S.Ct. 995, 998 n. 2, 31 L.Ed.2d 274, 279 n. 2 (1972); Doe v. State, 487 P.2d 47, 53-54 (Alaska 1971). Challenges to one-year residency requirements can seldom be pursued through both trial and appellate stages within the one year in which a given plaintiff is aggrieved. Yet there will always be others who have been residents for less than one year. If we required one of them to begin a new suit, it would probably be moot before appellate review could be obtained. There would never be a decision on the merits.
II
Durational residence requirements are subject to strict scrutiny under the equal protection clauses of the federal and state constitutions because they penalize those who have exercised their fundamental right of interstate migration.5 Memorial [163]*163Hospital v. Maricopa County, 415 U.S. 250, 94 S.Ct. 1076, 39 L.Ed.2d 306 (1974) (non-emergency medical care at public expense, 1 year); Dunn v. Blumstein, 405 U.S. 330, 92 S.Ct. 995, 31 L.Ed.2d 274 (1972) (voting, 1 year); Shapiro v. Thompson, 394 U.S. 618, 89 S.Ct. 1322, 22 L.Ed.2d 600 (1969) (welfare benefits, 1 year); Gilbert v. State, 526 P.2d 1131 (Alaska 1974) (legislative candidacy, 3 years, upheld); State v. Adams, 522 P.2d 1125 (Alaska 1974) (divorce, 1 year); State v. Wylie, 516 P.2d 142 (Alaska 1973) (public employment, 1 year); State v. Van Dort, 502 P.2d 453 (Alaska 1972) (voting, 75 days).
Under strict scrutiny, the law must be struck down unless the state can demonstrate that it is necessary to further a compelling state interest, and is the least drastic means available to further that interest. Dunn v. Blumstein, supra, 405 U.S. at 342-43, 92 S.Ct. at 1003-04, 31 L.Ed.2d at 284-85.6
In its two most recent durational residency cases, the United States Supreme Court has abandoned this standard. Maricopa, supra (striking down a 1-year requirement for non-emergency medical care at public expense); Sosna v. Iowa, 419 U.S. 393, 95 S.Ct. 553, 42 L.Ed.2d 532 (1975) (upholding a 1-year requirement for divorce). In Mari-copa the Court was concerned with the nature of the public benefit withheld during the waiting period, stating that a durational residency requirement will be struck down only if it penalizes the right of migration by depriving the recent migrant of a basic necessity of life. This was not enunciated in Sosna although it is not entirely plausible explanation for Sosna as well. It has been criticized from a variety of viewpoints. See, e. g., Maricopa, supra, 415 U.S. at 284-88, 94 S.Ct. at 1094-97, 39 L.Ed.2d at 329-32 (Rehnquist, J., dissenting); Barrett, Judicial Supervision of Legislative Classifications — A More Modest Role for Equal Protection?, 1976 B.Y.U.L.Rev. 89, 118-20; Comment, A Strict Scrutiny of the Right to Travel, 22 U.C.L.A.L.Rev. 1129 (1975).
We have never used this “basic necessities” reasoning. See generally Comment, Durational Residency Requirements: The Alaskan Experience, 6 U.C.L.A.-Alaska L.Rev. 50 (1976). On the other hand, our use of strict scrutiny has not always resulted in holding challenged laws unconstitutional. In Gilbert v. State, supra, we upheld the 3-year residency requirement for members of the legislature imposed by Article II, section 2 of the Alaska Constitution. We held that it was the least restrictive means available to further the compelling state interests in having the voters familiar with their legislators, and legislators familiar with the state and its problems.
With that background, we proceed to subject the Alaska Hire law to strict scrutiny. The principal precedent is State v. Wylie, supra, in which we held unanimously that the state could not give a preference in public employment to persons who had lived in Alaska for a year before applying.
The interests which the state seeks to further through the Alaska Hire law are similar to those which were claimed to be “compelling” in Wylie. They are set forth in AS 38.40.010 and .020.7 Through Alaska [164]*164Hire, the state seeks to reduce the high unemployment rate for Alaska residents, and to use the extraction of Alaska’s natural resources as an opportunity to cultivate its human resources.8 Reducing unemployment, the state said in Wylie, was also the goal of a durational residency requirement for civil servants.
In Wylie, we found that a durational residency requirement for civil servants was not the least drastic means to further this governmental interest. 516 P.2d at 149. Indeed, we seriously questioned whether it furthered that interest at all. Unemployment in Alaska, we noted, is caused in large part by lack of education and vocational training, and there are few jobs — public or private — in rural areas where unemployment is highest. The dura-tional residency requirement did not increase the number of jobs, nor did it necessarily hold down immigration into the state. Id. Job training, we suggested, would probably be a more effective way to reduce unemployment, and would not discriminate against recent migrants. Id. at 149 n. 14.
The superior court found that each of these concerns of Wylie is met by AS 38.40 and the manner in which the state has implemented it. Pipeline jobs are mostly in the rural areas and workers are not required to permanently relocate themselves and their families to their place of employment. The workers are fed and housed by their employers and they are able to return to their homes and families during vacation periods. On the other hand, workers are dispatched to many such jobs from union halls in Fairbanks or Anchorage.
The state initiated a training program for unskilled Alaskans with commencement of pipeline construction. It is necessary, the state argues, that the trainees have some guarantee that jobs will be awaiting them if they are to make the commitment of time and effort necessary to leave their rural homes to enter and complete a job training program.
Unlike the situation in Wylie, most of the projects covered by Alaska Hire are and will be of a “boom,” short-durational nature. If a trainee is to apply the benefits of his training by getting a job on such a project, he cannot be made to wait until all new arrivals, who may be in a more job-competitive position, have been hired. The project would be completed before that happened.
To state the differences between the facts of this case and Wylie is not to decide the issue. There are countervailing considerations.
The extent to which the Alaska Hire Law in fact benefits unemployed Alaskans and those in job training is questionable. Alaska Hire does not distinguish among those who have been one-year residents; it gives all of them an absolute preference over those who are not one-year residents. A lifelong Alaskan employed in a private business or the public sector would be entitled to preference under Alaska Hire if he sought a new job. An unemployed person, or one who had just completed a private or public training course qualifying him for pipeline or petroleum employment, but who [165]*165had taken an extended trip outside the state eleven months earlier, would be unable to obtain preference.9
While under strict scrutiny the correlation between the classification made by the statute and the goals sought to be achieved need not be perfect, it must be sufficiently strong that the classification is the least drastic means to achieve those ends. We cannot say that a one-year dura-tional residency requirement is the least drastic means available to the state in its quest for reduced unemployment and a stabilized economy. Therefore, we hold that AS 38.40.090(1)(A) violates the equal protection clauses of the federal and state constitutions.10 The challengers point out that the least drastic, and also the most effective, means to help the unemployed and recent trainees to find jobs, is to give an employment preference only to the unemployed and recent trainees.
The state stresses an additional fact not present in Wylie. In the industries covered by Alaska Hire, there are pools of migratory skilled workers. When a project is complete, they tend not to remain in the area, but to travel to another major construction project or petroleum development elsewhere. Such persons, the state points out, often have a highly mobile lifestyle and in a very short time could acquire the indicia of Alaska residence — mailing address, voter registration, driver's license, auto registration. A durational residency requirement, and not merely a residency requirement, is needed, according to the state, in order to strengthen to local economy and labor force by giving preference to Alaskans who lived here previously and are more likely to stay when the oil and gas project is completed. As we shall demonstrate later in this opinion, Alaska Hire is not invalid in its entirety, and there are steps Alaska can constitutionally take to insure that the preference goes only to bona fide residents. Our holding is merely that it sweeps too broadly to define bona fide residency so that no one may qualify until he or she has lived in Alaska for one year.
Nor do the cases upholding a one-year residency requirement for reduced public college tuition support the one-year requirement of Alaska Hire. Those requirements, like Alaska Hire, were enacted to deny the benefit to those who had become residents of the state only upon enrolling at the college. Starns v. Malkerson, 326 F.Supp. 234 (D.Minn.1970), aff’d, 401 U.S. 985, 91 S.Ct. 1231, 28 L.Ed.2d 527 (1971); Vlandis v. Kline, 412 U.S. 441, 452, 93 S.Ct. 2230, 2236, 37 L.Ed.2d 63, 72 (1973) (dictum). But Alaska Hire would resemble an absolute preference in enrollment for one-year residents, not a reduced tuition rate. Those cases do not support such an absolute preference, nor do any others.
The state also suggests that our scrutiny should be less strict because Alaska Hire does not bar non-residents from employment, but merely gives a preference to residents. But as long as there are available Alaska residents, it is a bar to those who cannot meet the residency standards. Be it bar or preference, the appellants have sought jobs on the pipeline, but have been unsuccessful because of the Alaska Hire [166]*166law. A state labor official testified that about 74 percent of the pipeline work force meet the Alaska Hire residency requirements.
Ill
The appellants also challenge the constitutionality of the remainder of the Alaska Hire law which, after AS 38.40.090(1)(A) is stricken, limits these petroleum and pipeline jobs to residents of Alaska. They allege that it violates both the equal protection and privileges and immunities clauses.
A residency requirement does not penalize the right of interstate migration, unlike a durational residency requirement, because it does not burden those who have recently migrated interstate. Hence it is not subject to strict scrutiny on that ground. See McCarthy v. Philadelphia Civil Service Comm., 424 U.S. 645, 646-47, 96 S.Ct. 1154, 1155, 47 L.Ed.2d 366, 367-68 (1976); Lynden Transport, Inc. v. State, 532 P.2d 700, 706-07 (Alaska 1975).
Appellants ask that strict scrutiny be applied to the residency requirement because it infringes a claimed fundamental right to work. We have concluded, like the U.S. Supreme Court in Massachusetts Board of Retirement v. Murgia, 427 U.S. 307, 313, 96 S.Ct. 2562, 2566, 49 L.Ed.2d 520, 524 (1976), that this is not a fundamental right calling for strict scrutiny.11
Article I, section 1 of our Constitution states that all people are entitled to “the enjoyment of the rewards of their own industry.” That clause, and the indisputable truth that gainful employment is an economic necessity for most people, do not persuade us to apply strict scrutiny. In Wylie, notwithstanding that clause, we noted in dictum that the state could impose a residency requirement at the time of application upon applicants for public employment. 516 P.2d at 150 n. 15.
We are troubled by the possible ramifications of holding that the right to work is a fundamental right. Our statutes impose prerequisites of varying severity for licenses to pursue many occupations and professions. May the state, for example, require that professionals have graduated from accredited institutions of learning (e. g. AS 08.08.130(a)(4) & AS 08.80.110(3)) only if it can demonstrate to the court that this is the least drastic means to further a compelling state interest? What would be the fate under strict scrutiny of AS 23.40.110(b), which permits union shop or agency shop agreements for public employees? A “fundamental right” of the character suggested by the appellants might unduly constrict the legislature’s ability to respond to perceived public needs, without any corresponding benefit to personal liberty or the public good.12
[167]*167Appellants’ alternative argument for strict scrutiny of the residency requirement is that non-residents should be declared a suspect class under Alaska’s Constitution and therefore entitled to the additional protection of strict scrutiny for laws which impose disabilities upon them. They base this argument on cases holding that aliens are a suspect class under the federal Constitution.13 This argument is undercut by Mathews v. Diaz, 426 U.S. 67, 84-87, 96 S.Ct. 1883, 1893-95, 48 L.Ed.2d 478, 493-94 (1976), holding unanimously that alienage is a suspect classification only for state laws, not for federal laws. Alienage most obviously differs from non-residence in a state because of the difficult and time-consuming process required to become a U.S. citizen, as opposed to the ease with which a person can change his residence to a new state. In addition, the plenary power of the political branches of the federal government to exclude and control aliens has no equivalent in the state government, which cannot similarly exclude or control U.S. citizens resident in other states. See id. at 86 n. 26, 96 S.Ct. at 1894 n. 26, 48 L.Ed.2d at 493-94 n. 26.
We do not believe it would be reasonable to require a state to meet the exceedingly exacting standards of strict scrutiny on all the numerous occasions when it seeks to benefit its residents — those who pay its taxes and elect its officers — in preference to persons who reside elsewhere.
Since there is no ground for applying strict scrutiny to the residency requirement, we must use the lower standard of review. Under the state Constitution, the test is laid out in Isakson v. Rickey, 550 P.2d 359 (Alaska 1976): the classification must bear a fair and substantial relation to a permissible state interest. Under the federal Constitution, the test is much more deferential: the law is to be upheld if the legislature could have had any conceivable basis to believe that it furthered a permissible state interest. E. g., City of New Orleans v. Dukes, 427 U.S. 297, 96 S.Ct. 2513, 49 L.Ed.2d 511 (1976).
Since the distinction made by Alaska Hire between residents and non-residents bears a close correlation to the state’s interest in providing economic benefit to residents, the subject of dispute is whether this interest is a permissible one for the state to promote. See Lynden Transport, Inc. v. State, 532 P.2d 700, 709-11 (Alaska 1975); Tussman and tenBroek, The Equal Protection of the Laws, 37 Calif.L.Rev. 341, 362-64 (1949); Developments in the Law— Equal Protection, 82 Harv.L.Rev. 1065,1081 (1969). This is the subject of the privileges and immunities clause of Article IV of the United States Constitution, to which we now turn our attention.
Article IV, section 2, of the federal Constitution says that “The citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States.”14 The privileges and immunities clause is not an absolute; the standard of review is similar to that which we established in Isakson v. Rickey, supra, for equal protection review. Compare Toomer v. Witsell, 334 U.S. 385, 396, 68 S.Ct. 1156, [168]*1681162, 92 L.Ed. 1460, 1471 (1948) with Isakson, supra, 550 P.2d at 362 (Alaska 1976).
“Like many other constitutional provisions, the privileges and immunities clause is not an absolute. It does bar discrimination against citizens of other States where there is no substantial reason for the discrimination beyond the mere fact that they are citizens of other States. But it does not preclude disparity of treatment in the many situations where there are perfectly valid independent reasons for it. Thus the inquiry in each case must be concerned with whether such reasons do exist and whether the degree of discrimination bears a close relation to them. The inquiry must also, of course, be conducted with due regard for the principle that the States should have considerable leeway in analyzing local evils and in prescribing appropriate cures.”
Toomer, 334 U.S. at 396, 68 S.Ct. at 1162, 92 L.Ed. at 1471, quoted in Lynden Transport, Inc. v. State, 532 P.2d 700, 709 (Alaska 1975) (footnote omitted).15
The standard list of “privileges and immunities” is from the opinion of Mr. Justice Bushrod Washington, sitting on circuit in 1823, in Corfield v. Coryell, 6 Fed.Cas. 546, 551-52 (No. 3,230) (C.C.E.D.Pa.1823). It is, he said, limited to “those privileges and immunities which are, in their nature, fundamental.” 16 It includes “[t]he right of a citizen of one state to pass through, or to reside in any other state, for purposes of trade, agriculture, professional pursuits, or otherwise.” In Corfield, a Pennsylvanian challenged a New Jersey law which limited commercial fishing for shellfish to local fishermen. The law was upheld, on the ground that the fishery was the common property of all the people of New Jersey, and could be limited to them. Accord, Geer v. Connecticut, 161 U.S. 519, 16 S.Ct. 600, 40 L.Ed. 793 (1896) (game birds); McCready v. Virginia, 94 U.S. 391, 24 L.Ed. 248 (1877) (fish). Corfield thus set forth both the rule and the exception, both of which are relevant to this case.
These cases were distinguished in Toomer, supra, which struck down a prohibitively high license fee for out-of-state commercial fishermen.17 The shrimp in Toomer, unlike the fish in inland waters involved in McCready, migrated along the coast of a number of states and could not be said to belong to any of them. 334 U.S. at 399-403, 68 S.Ct. at 1163-66, 92 L.Ed. at 1473-75.18 The state’s “ownership” is less of a legal fiction in this case than it is with respect to fish and game. Alaska Hire does not apply to all jobs in extractive industries, but only those on projects to which the state government has a contractual nexus. See generally Alleyne, Constitutional Restraints on the Preferential Hiring of Alaskan Residents for Oil Pipeline Construction, 2 U.C.L.A.-Alaska L.Rev. 1, 3-8 (1972).
McCready v. Virginia, supra, has been distinguished, but it has never been overruled. We have concluded that it states the principle applicable to the decision of this case. Article VIII, section 2 of the Alaska Constitution, stating that Alaska’s natural resources shall be used and developed in ways that will benefit Alaska’s people, is not inconsistent with the privileges and immunities clause. The natural re[169]*169sources of Alaska “belong” to Alaska and to Alaskans in a way that, in our federal system, Alaska’s society and economy in general do not.
Appellants, of course, strenuously object to this line of reasoning. They correctly point out that, under Pennsylvania v. West Virginia, 262 U.S. 553, 43 S.Ct. 658, 67 L.Ed. 1117 (1923) and West v. Kansas Natural Gas Co., 221 U.S. 229, 31 S.Ct. 564, 55 L.Ed. 716 (1911), Alaska could not allow the export of oil or gas only after all local needs were met. But these cases were decided under the commerce clause, not the privileges and immunities clause. One of the principal reasons the United States Constitution was written, to replace the old Articles of Confederation, was to make the United States a single economic unit, without barriers to interstate trade. See generally H. P. Hood & Sons v. DuMond, 336 U.S. 525, 530-39, 69 S.Ct. 657, 661-66, 93 L.Ed. 865, 870-75 (1949). Laws forbidding or burdening exports from a state, or imports into it, are inconsistent with that principle.
But no commerce clause claim is advanced against Alaska Hire. Accepting the premise that the United States has and should have one common economy, we do not accept the offered conclusion that the government of Alaska can never make benefits available to citizens of Alaska in preference to citizens of other states.
Edwards v. California, 314 U.S. 160, 62 S.Ct. 164, 86 L.Ed. 119 (1941), does not compel a decision to the contrary. In Edwards, the Court held invalid a state law making it a crime to assist indigent non-residents to come into the state. In purpose and in effect, the law was a direct barrier to interstate travel and migration. Alaska Hire does not erect a barrier to interstate travel or migration. With the durational residence requirement stricken, it permits new as well as long-time residents to receive a preference. It gives the state’s benefits to those who bear its burdens, without placing any limitation on who may voluntarily assume those benefits and burdens.
We rely on the McCready “natural resources exception” to the privileges and immunities clause. The trial court, on the other hand, upheld the law on the ground that it was not economic protectionism for its own sake, and so fell within the “independent reasons” exception to the privileges and immunities clause articulated in the quotation from Toomer, supra. The trial judge referred to Alaska Hire as an attempt to solve “problems that may be typified as social, racial, educational, and economic.” We are hesitant to classify Alaska Hire as something other than an attempt to strengthen the Alaskan economy. In Baldwin v. G. A. F. Seelig, Inc., 294 U.S. 511, 523, 55 S.Ct. 497, 500, 79 L.Ed. 1032, 1038 (1935), a commerce clause case, the Supreme Court rejected an attempt to justify regulation of the price of imported milk by analogy to regulation of its purity, which would unquestionably be valid. We believe that the better alternative is to consider Alaska Hire an economic measure justified by the “natural resources exception,” the principle that a state may prefer its residents in dealing with natural resources it owns.
IV
Appellants also challenge the constitutionality of the four indicia of residence other than duration listed in AS 38.-40.090(1): maintaining a place of residence in Alaska, residency for voting purposes, no claim of residency elsewhere, and an intent shown by all attending circumstances to be a permanent resident. We find no constitutional fault with any of them, and use our discussion of them to outline in some detail the standards which will govern determination of Alaska residence for the purposes of AS 38.40.19
[170]*170Maintaining a place of residence simply means being ordinarily physically present in Alaska, having a place within Alaska where one ordinarily stays, and having no such place anywhere else. The department of labor considers that a construction camp may meet this requirement.
Residency for voting purposes, under State v. Van Dort, 502 P.2d 453 (Alaska 1972), and AS 15.05.010(4) means durational residency for 30 days. In Van Dort, we found 30-day residency necessary to further the compelling state interest in preventing fraud and administering elections, and hence a constitutionally valid indicium of bona fide residence. The state does not construe this clause to require a worker either to register or to vote.20 As in Van Dort, in order to determine bona fide residency vel non, this 30-day requirement is permissible.
The fourth criterion is that the worker may not claim residency anywhere else during the durational period. Since we have stricken the durational period, we interpret this to mean no claim of residency anywhere else at the time of application or thereafter. Since it is part of the concept of domicile (which is what bona fide residency means for these purposes)21 that a person may have only one domicile at a time,22 this is a reasonable requirement for determining bona fide residency.
Likewise, the fifth criterion, that the surrounding circumstances show an intent to make Alaska one’s permanent home, is part of the definition of domicile, the intent to remain and not to go elsewhere.23 “Permanent” does not require a promise to stay here forever. This indicium is no more subjective or vague than the concept of domicile itself.
The application form for a residency card asks for the following information covering the period of two years prior to application: all addresses where the applicant has lived; occasions on which the applicant has been physically outside Alaska, with reasons therefor; voting outside Alaska; claiming residency elsewhere “for any reason”; and all jobs held. Appellants conclude from this that the state department of labor has created a de facto two-year durational residency requirement. The only relevant testimony, that of David Pinrow, is to the contrary. He said that evidence of attachment to another jurisdiction within the past two years is not grounds for automatic denial of a card, but that “a person’s past practices sometimes indicate what his intentions are with regard to permanent Alaska residence.” It goes to the second, fourth, and fifth criteria, not [171]*171the first. This is in accord with the legal principle that evidence of domicile at an earlier time is evidence of domicile at a later time. 9 J. Wigmore, Evidence § 2530 (3d ed. 1940); C. McCormick, Evidence § 294 at 695-96 (2d ed. 1972) (statements of intent as to domicile are evidence of domicile at a later time also).
Having concluded that the state may constitutionally give a preference to residents, we find nothing in any of these remaining criteria, or in the state’s administration of them, that acts as an impermissible standard for determining residence. The state is constitutionally entitled to use reasonable administrative means to determine who is a bona fide resident and who is not. Domicile or bona fide residence contains an objective requirement of physical presence and a subjective intent requirement. It is not unreasonable to use the objective indicia listed in AS 38.40.090(1), other than the one-year requirement, to aid in determining whether an applicant has the subjective intent which is a necessary element of bona fide residence.
We note in particular that to be classified as a resident of Alaska, a person may not claim residence elsewhere. A person receiving any benefit from any other state on the basis of his residence in that state — e. g. voting, unemployment compensation, public assistance, “resident” tuition rate for un-emancipated children, etc. — would not qualify. Likewise, once a person becomes an Alaska resident for this purpose, he becomes an Alaska resident for all purposes. For example, he must pay all taxes imposed upon residents by this state and the political subdivision in which he resides. He must register any motor vehicles in his possession with the Alaska department of motor vehicles. Failure to do so would be evidence that the person is not in fact a resident and not entitled to the preference.
Just as a person may register to vote less than 30 days after beginning to reside in Alaska, but may not vote until after 30 days have elapsed, so a person may apply for a residency card within the initial 30 days, but may not receive any preference in hiring during that 30-day period. As under the election laws, the 30-day period both serves administrative convenience and acts as an indicator of bona fide residence and intent to remain in Alaska.
V
In summary, we affirm the trial court’s denial of relief, except with respect to AS 38.40.090(1)(A), imposing a one-year dura-tional residency requirement, which we hold invalid as violating the equal protection clauses of the state and federal constitutions.
AFFIRMED IN PART AND REVERSED IN PART.
BOOCHEVER, C. J., with whom RABI-NOWITZ, J., joins, dissenting in part.