COHN, District Judge.
I. INTRODUCTION.
A. Nature of the Case.
This case involves a fourth amendment challenge to the scope of section 909.05 of the Ohio Revised Code (ORC) which empowers the Ohio Director of Agriculture or his authorized representative to conduct warrantless searches of apiaries and other premises, buildings or places where bees or bee paraphernalia are kept.1 After notification of a planned warrantless inspection of their apiaries, the plaintiff-beekeepers commenced separate actions for declaratory and injunctive relief in the United States District Court for the Northern District of Ohio. The district court granted the plaintiffs’ motion for partial summary judgment in the Allinder action and permanently enjoined the Ohio Department of Agriculture from “conducting warrantless, nonconsensual inspections of apiaries pursuant to the Ohio Apiary Inspection Law, ORC § 909.-05” on the grounds the law was unconstitutional “insofar as it purports to authorize non-consensual apiary inspections without a warrant or its equivalent.” Allinder v. Ohio, 614 F.Supp. 282 (N.D.Ohio 1985). The Steiner plaintiffs and defendants stipulated that the order entered in the Allinder action would apply in the Steiner action, and that the two actions would be consolidated for purposes of appeal and trial on the remaining issues. Defendants appeal from the injunctive orders in both cases. This court consolidated the two actions on appeal. For the reasons which follow, we affirm the district court in substantial part.
B. The Regulatory Scheme.
Pursuant to Chapter 909 of the ORC, Ohio maintains an apiary2 inspection pro[1183]*1183gram.3 The program is designed to detect bee diseases in their early stages and to prevent their spread. ORC § 909.03 declares infected hives a public nuisance. Under ORC § 909.03, the director of agriculture has rulemaking and enforcement powers “as in his judgment are necessary to control, eradicate, or prevent the introduction, spread, or dissemination of any bee diseases.” Of particular concern in the production of honey and pollination of crops is the spread of American Foulbrood disease (AFB) which infects the preadult stage of the bee.4 Although the disease is not harmful to humans, it can destroy entire colonies of bees. Under ORC § 909.02, a beekeeper must register his apiaries with the director of agriculture along with directions as to their location. Not all beekeepers are registered, primarily because of their ignorance of the statutory requirements. The program is enforced by the state apiarist, four deputy apiarists, and part-time county inspectors who are appointed and funded by the individual counties and over whom the state retains little control.5 Because of the technical knowledge needed to make inspections, inspectors are often competitors of those whom they inspect and are often charged with the responsibility of inspecting their own apiaries. Under ORC § 909.05, an inspector is expressly authorized to examine apiaries without prior notice, without a warrant and outside the presence of the owners.
There are no published rules and regulations. The inspectors are provided a training manual which appears to outline the goals and guidelines of the program. Final decisions as to what to inspect, how to inspect and when to inspect rests with the individual inspectors.
Inspection involves manipulation of the hive6 and not merely visual inspection of the exterior of an apiary. The inspector approaches the hive and removes the lid with a crowbar-like hive.tool. The front entrance of the hive is then smoked with another appliance to subdue the bees. Smoking continues as needed throughout the inspection process. The inner cover, honey layers, queen excluder, and other layers are manipulated and removed to arrive at the bottom layers where the brood7 chambers are located. All the layers in the hive are stuck together with propolis, a sticky substance which the bees process from tree residues, and which generally has to be pried from the hive. Some of the brood frames are then removed and examined for signs of disease. If the inspector diagnoses AFB, surrounding colonies or sometimes the entire apiary is quarantined under ORC § 909.04. A sample is taken from the colony and sent to the Ohio Department of Agriculture laboratory for testing. If the presence of AFB is confirmed, the bees and hive equipment are ordered destroyed by burning. Under ORC § 909.16, the beekeeper has five days within which to appeal the decision to burn the bees and equipment to the Director of Agriculture whose determination is final.
C. The Parties.
The Allinders and the Steiners are commercial beekeepers in the business of raising bees for honey production and renting bees to farmers for crop pollination. The Allinders’ 600 hives and the Steiners’ ap[1184]*1184proximately 850 hives are located in seven different counties in Ohio. They registered their apiaries with the added notation “No inspection permitted without a warrant.”
II. THE ELEVENTH AMENDMENT.
A. The State Defendants.
Defendants first argue that the district court did not have jurisdiction under the eleventh amendment bar to an action against the State. The argument has merit as to defendants State of Ohio and Ohio Department of Agriculture. The Supreme Court has consistently interpreted the eleventh amendment to preclude a citizen from bringing suit against his own state in a federal court. Edelman v. Jordan, 415 U.S. 651, 94 S.Ct. 1347, 39 L.Ed.2d 662 (1974); Employees v. Dep’t of Public Health and Welfare of Missouri, 411 U.S. 279, 93 S.Ct. 1614, 36 L.Ed.2d 251 (1973). Contrary to plaintiffs’ contention that defendants have waived immunity by proceeding in these actions, a waiver of eleventh amendment immunity will be found only where indicated “ ‘by the most express language or by such overwhelming implications from the text as [will] leave no room for any other reasonable construction.’ ” Edelman, 415 U.S. at 673, 94 S.Ct. at 1361 (quoting Murray v. Wilson Distilling Co., 213 U.S. 151, 171, 29 S.Ct. 458, 464, 53 L.Ed.2d 742 (1909)); Ohio v. Madeline Marie Nursing Homes #1 and #2, 694 F.2d 449 (6th Cir.1982). The defense may be raised for the first time on appeal, Edelman, 415 U.S. at 678, 94 S.Ct. at 1363, and a state’s appearance and offer of defenses on the merits is no bar; the defense is jurisdictional and may be raised at any stage of the proceedings. Florida Dep’t of State v. Treasury Salvors, Inc., 458 U.S. 670, 683 n. 18, 102 S.Ct. 3304, 3314 n. 18, 73 L.Ed.2d 1057 (1982) (Opinion of Stevens, J.). Defendants asserted the eleventh amendment as an affirmative defense in their answers to the complaints in both actions and have never indicated an intention to waive the defense. See Madeline Marie Nursing Homes #1 and #2, 694 F.2d 449. The State of Ohio and the Ohio Department of Agriculture must be dismissed as defendants for lack of jurisdiction.
B. The Individual Defendants.
The.eleventh amendment defense of defendants Eric Nelson, a bee inspector in the Steiner action, and Dale Locker, the director of the Ohio Department of. Agriculture in both actions, implicates an exception to eleventh amendment immunity first recognized in Ex parte Young, 209 U.S. 123, 28 S.Ct. 441, 52 L.Ed. 714 (1908). In Young, the Supreme Court held that state immunity did not shield a state official attempting to enforce an unconstitutional act. Under Young, a state cannot transfer its immunity to an official who must accede to his “responsibility to the supreme authority of the United States.” 209 U.S. at 160, 28 S.Ct. at 454. Accordingly, Nelson and Locker are proper defendants.
III. THE FOURTH AMENDMENT.
A. The Existence of a Search.
1. Open Fields.
Before invoking the fourth amendment, we must first determine if there has been a search. Dow Chemical Co. v. United States, 749 F.2d 307, 311 (6th Cir.1984), aff'd, — U.S. —, 106 S.Ct. 1819, 90 L.Ed.2d 226 (1986). Defendants argue that no search occurred, relying on the “open fields” doctrine first enunciated in Hester v. United States, 265 U.S. 57, 44 S.Ct. 445, 68 L.Ed. 898 (1924), and recently reaffirmed in Oliver v. United States, 466 U.S. 170, 104 S.Ct. 1735, 80 L.Ed.2d 214 (1984). In both Hester and Oliver, the Supreme Court held that a visual observation of an open field did not violate the fourth amendment.
Defendants’ reliance on these cases is misplaced. Oliver did not overrule the holding in Katz v. United States, 389 U.S. 347, 88 S.Ct. 507, 19 L.Ed.2d 576 (1967), that the fourth amendment protects per[1185]*1185sons and not places.8 See 466 U.S. at 176 n. 6, 104 S.Ct. at 1740 n. 6. Oliver focused on factors such as the “intention of the Framers of the Fourth Amendment”, the uses to which a location is put and the societal understanding as to areas deserving protection from government invasion in concluding that society does not recognize an expectation of privacy in open fields as reasonable. Id. at 178-79, 104 S.Ct. at 1741. In decisions following Katz, the Supreme Court has consistently adhered to the open fields doctrine while at the same time recognizing that it is limited in scope to “sights seen in ‘the open fields.’ ” Air Pollution Variance Bd. of Colorado v. Western Alfalfa Corp., 416 U.S. 861, 865, 94 S.Ct. 2114, 40 L.Ed.2d 607 (1974). In Air Pollution Variance Bd., the Supreme Court held that a field inspector did not violate the fourth amendment when he stood on the property of defendant to observe plumes of smoke and visually rate them as to air pollution standards. The Court carefully noted that the inspector did not enter the physical plant or inspect the files, papers or equipment of defendant. Id. at 864-65, 94 S.Ct. at 2115-16.
Similarly, in Maine v. Thornton, a case consolidated with Oliver, the officers making a visual inspection of fields spotted marihuana growing, but they obtained a search warrant before they seized the marihuana. 466 U.S. at 174, 104 S.Ct. at 1739. In Maine, the Supreme Court also distinguished the fourth amendment protection afforded to “effects” by limiting the term “effect” to personal rather than real property.” Id. at 177 n. 7, 104 S.Ct. at 1740 n. 7.
More recently, in Dow Chemical Co. v. United States, the Supreme Court applied the open fields doctrine to uphold the aerial observation and photography of an industrial plant complex. The Supreme Court did acknowledge that defendant had a legitimate expectation of privacy from unreasonable government entries into its covered buildings and private commercial property while emphasizing that the observation took place “without physical entry”, and that any such entry would raise “significantly different questions.” 106 S.Ct. at 1825-26 (emphasis in original).'
2. Limitations on Open Fields.
There is no case, however, where the open fields doctrine has been applied to allow a search of personal effects or of a commercial structure in a field. Defendants attempt to extend the holding in Oliver beyond the open fields exception it addressed, and into the realm of structures as presented in this case, must fail. To so extend the open fields exception, we would have to ignore a long line of Supreme Court cases which have extended fourth amendment protection to areas other than the home and its curtilage. Cf. Donovan v. Dewey, 452 U.S. 594, 101 S.Ct. 2534, 69 L.Ed.2d 262 (1981) (stone quarry); Arkansas v. Sanders, 442 U.S. 753, 99 S.Ct. 2586, 61 L.Ed.2d 235 (1979) (luggage); Michigan v. Tyler, 436 U.S. 499, 98 S.Ct. 1942, 56 L.Ed.2d 486 (1978) (store); Marshall v. Barlow’s, Inc., 436 U.S. 307, 98 S.Ct. 1816, 56 L.Ed.2d 305 (1978) (employee working area of business premises); G.M. Leasing Corp. v. United States, 429 U.S. 338, 97 S.Ct. 619, 50 L.Ed.2d 530 (1977) (office); United States v. Chadwick, 433 U.S. 1, 538, 97 S.Ct. 2476, 53 L.Ed.2d 538 (1977) (footlocker); Mancusi v. DeForte, 392 U.S. 364, 88 S.Ct. 2120, 20 L.Ed.2d 1154 (1968) (office); See v. City of Seattle, 387 U.S. 541, 87 S.Ct. 1737, 18 L.Ed.2d 943 (1967) (locked commercial warehouse).9
[1186]*1186B. Apiaries.
Inspections authorized by ORC § 905.05, and the inspections to which plaintiffs object here, do not involve a mere visual inspection of apiaries in an open field. Rather, the statute allows a -warrantless inspection of “any premises, buildings, or any other place, public or private, in which [the Director of Agriculture or his authorized representatives have] reason to believe that bees, honey, wax, used hives, or used appliances are kept,” except “occupied dwelling[s].” Id. Thus, for example, it allows for an entry into any commercial structure where bee equipment is stored. But as the Supreme Court has explained: while the government may observe, without a warrant, whatever is observable by the public, areas where only employees are permitted are not “thrown open ... to the warrantless scrutiny of Government agents.” Barlow’s, Inc., 436 U.S. at 315, 98 S.Ct. at 1822. “[Reasonableness is still the ultimate standard.” Id. (quoting Camara v. Municipal Court, 387 U.S. 523, 539, 87 S.Ct. 1727, 1736, 18 L.Ed.2d 930 (1967)).
Nor can the warrantless physical intrusion, manipulation and dismantling of the hives themselves be sanctioned by the visual inspection allowable under the open fields doctrine. Apiaries are commercial property. They are also personal property since they are movable and at times are moved for rental to farmers in crop pollination. As such they fall within the definition of effects in Oliver, 466 U.S. at 177 n. 7, 104 S.Ct. at 1740 n. 7,10 and are therefore expressly afforded protection by the fourth amendment.
While the hives are subject to visual observation of their exteriors by a passerby, there is no claim that the hives give the appearance of abandoned property. Inspections can only be performed by a trained apiarist. The hives have bees entering and exiting at all times. As previously described, a smoker must be used to subdue the bees to enable an inspector to approach a hive, and a special hive tool must be used to pry apart the layers of the hive. With the exception of the small opening for bees, the hive is virtually sealed shut with bee propolis. The interior of the hives are simply not accessible to the public’s view. The apiaries are “effects” and as such are part of plaintiffs’ commercial personal property. We conclude that the physical intrusion, manipulation and dismantling of the hives by a state inspector constitutes a search under the fourth amendment.
C. The Administrative Search Exception to the Warrant Requirement.
For nearly two decades, the Supreme Court has followed the general rule that a warrant is required before conducting an administrative search of commercial property or commercial products. See v. City of Seattle, 387 U.S. at 544-45, 87 S.Ct. at 1739-40. In See, the Supreme Court concluded that “warrants are a necessary and a tolerable limitation on the right to enter upon and inspect commercial premises.” 387 U.S. at 544, 87 S.Ct. at 1740.
Later decisions have limited this rule so that the fourth amendment does not prohibit all such searches, but only those that are unreasonable. Donovan, 452 U.S. at 599, 101 S.Ct. at 2538. In Donovan, the Supreme Court held that in certain limited situations, warrantless administrative searches of commercial property do not violate the fourth amendment. This Circuit has characterized these exceptions un[1187]*1187der the rationale of “the notion of implied consent.” Dow Chemical Co., 749 F.2d at 311 n. 1; see also, Barlow’s, Inc., 436 U.S. at 313, 98 S.Ct. at 1820-21. However, since this form of search is an exception to the warrant requirement, the burden of proof rests with the party asserting the exception. See Barlow’s, Inc., 436 U.S. at 324, 98 S.Ct. at 1826.
1. Pervasively and Closely Regulated Industries.
An exception to the warrant requirement exists for “closely regulated industries long subject to inspection” and for “pervasively regulated” businesses, Barlow’s, Inc., 436 U.S. at 313, 98 S.Ct. at 1820-21, for which, because of the nature of the regulation, no reasonable expectation of privacy exists. Cf. Colonnade Catering Corp. v. United States, 397 U.S. 72, 90 S.Ct. 774, 25 L.Ed.2d 60 (1970) (premises of retail dealer in liquor); United States v. Biswell, 406 U.S. 311, 92 S.Ct. 1593, 32 L.Ed.2d 87 (1972) (pawn shop).
Defendants argue that the state regulatory scheme involved here amounts to close and pervasive regulation. But as the district court noted:
The state apiarist testified that less than 100% of the beekeepers in Ohio are registered and that only about 85% of those registered are inspected every year. (Inj.Tr. at 33). He testified further that the typical reason for failure to register colonies is beekeepers who are unaware of the registration and inspection requirements.11
Moreover, the statute does not pervasively regulate the beekeeping industry. Defendants concede that the limited function of the statutory scheme is to control and eradicate bee diseases. We conclude that defendants have failed to establish that a beekeeper’s expectation of privacy in an apiary is unreasonable where the record fails to show either that the beekeeping industry has a long history of close regulation or that it is currently subject to pervasive and comprehensive regulation in Ohio.
2. A Predictable and Guided Regulatory Presence.
In Donovan, 452 U.S. at 604, 101 S.Ct. at 2541, the Supreme Court acknowledged another exception to the warrant requirement: A warrantless search is permissable if a statute “establishe[s] a predictable and guided federal regulatory presence.” See also Dow Chemical, 749 F.2d at 311 n. 1: “Inherent in this exception is a test that balances the strength of the federal regulatory interest, on the one hand, with the reasonable expectation of privacy of the commercial entity on the other.”
In Donovan the Supreme Court explained the criteria necessary to establish this exception as follows:
[A] warrant may not be constitutionally required when Congress has reasonably determined that warrantless searches are necessary to further a regulatory scheme and the federal regulatory presence is sufficiently comprehensive and defined that the owner of commercial property cannot help but be aware that his property will be subject to periodic inspections undertaken for specific purposes.
452 U.S. at 600, 101 S.Ct. at 2539.
Defendants argue that inspections of apiaries must be warrantless because of the need to retain the element of surprise so that a beekeeper cannot hide a diseased hive from the inspector’s view. Apiaries, defendants say, are so spread out and are so mobile, this is easy to hide from inspectors. They further argue that since the inspection season is limited, because inspections can only be conducted on a warm, dry day, and since most of the inspectors work part-time only, time is of the essence, and it would be an administrative burden to require a warrant.
The district court rejected these arguments in light of the testimony of the state apiarist that most beekeepers were hobbyists who welcomed inspections as an aid, and in light of testimony that plaintiffs [1188]*1188were notified of an inspection three days in advance. The district court noted that the high incidence of voluntary compliance refuted the argument as to administrative burden because most inspections would not require a warrant.
This same line of argument was rejected in Barlow’s, Inc., 436 U.S. 307, 98 S.Ct. 1816 (an electrical and plumbing installation business). In that case the Supreme Court noted that the government could obtain warrants ex parte and issue them without notice, thus retaining the element of surprise. The Supreme Court also rejected the administrative burden argument by reasoning that the government had failed to show that the required time lapse for obtaining the warrant seriously impeded the statute’s effectiveness. Id. at 316-19, 98 S.Ct. at 1822-24. In reaching this conclusion the Supreme Court noted the lower standard of proof for justifying issuance of an administrative search warrant. Id. at 320, 98 S.Ct. at 1824.
The district court also concluded that the program was subject to the warrant requirement because the statute provided too much discretion, i.e., it did not provide certainty, regularity and fairness. There is no requirement that inspections are to occur on any predetermined regular basis; there is only a “goal” to provide yearly inspections. Defendants concede that, they are hampered in reaching this goal because of a lack of funds, that available funds were subject to the discretion of the various counties who provided supplementary inspectors and that the goal had not been achieved.
Like the statute in Barlow’s, Inc., 436 U.S. at 323, 98 S.Ct. at 1826, the program scheme simply provides too much discretion in the individual inspector. Like the statute in Barlow’s, Inc., the program “fails to tailor the scope and frequency of such administrative inspections to the particular” purpose. Donovan, 452 U.S. at 601,101 S.Ct. at 2539. The program is ripe for potential abuse, especially because inspectors are often competitors of the apiaries inspected. Because an apiarist never knows when an inspection is due, and need not be present at an inspection, such broad discretion in inspectors can lead to problems as to hives which cannot be moved or disturbed, e.g., because of requeening. Exceptions to the warrant requirement are limited to those situations where the regulation scheme provides all the protection that a warrant would otherwise provide. Donovan, 452 U.S. at 598-99, 605, 101 S.Ct. at 2537-38, 2541. This condition is simply not met by the program at issue here.
In Barlow’s, Inc., the Supreme Court concluded:
A warrant, by contrast, would provide assurances from a neutral officer that the inspection is reasonable under the Constitution, is authorized by statute, and is pursuant to an administrative plan containing specific neutral criteria.
436 U.S. at 323, 98 S.Ct. at 1826.
We agree. Our decision today does not invalidate the entire regulatory scheme. Rather, we hold only that ORC § 909.05 authorizing nonconsensual warrantless inspections is unconstitutional.
The decision of the district court is AFFIRMED in part and REVERSED in part, and this case is REMANDED to the district court for further proceedings.12