delivered the opinion of the Court.
In 1972, professedly for the purpose of reducing unemployment in the State, the Alaska Legislature passed an Act entitled “Local Hire Under State Leases.” Alaska Stat. Ann. §§ 38.40.010 to 38.40.090 (1977). The key provision of “Alaska Hire,” as the Act has come to be known, is the requirement that “all oil and gas leases, easements or right-of-way permits for oil or gas pipeline purposes, unitization agreements, or any renegotiation of any of the preceding to which the state is a party” contain a provision “requiring the employment of qualified Alaska residents” in preference to nonresidents. 1 Alaska Stat. Ann. § 38.40.030 (a) (1977). 2 This employment preference is administered by providing persons meeting the statutory requirements for Alaskan residency with certificates of residence — -“resident cards” — that can be presented to an employer covered by the Act as proof of residency. 8 Alaska Admin. Code 35.015 (1977). Appellants, individuals desirous of securing jobs covered by the Act but unable to qualify for the necessary resident cards, challenge Alaska Hire as violative of *521 both the Privileges and Immunities Clause of Art. IY, § 2, and the Equal Protection Clause of the Fourteenth Amendment.
I
Although enacted in 1972, Alaska Hire was not seriously enforced until 1975, when construction on the Trans-Alaska Pipeline 3 was reaching its peak. At that time, the State Department of Labor began issuing residency cards and limiting to resident cardholders the dispatchment to oil pipeline jobs. On March 1, 1976, in response to “numerous complaints alleging that persons who are not Alaska residents have been dispatched on pipeline jobs when qualified Alaska residents were available to fill the jobs,” Executive Order #76-1, Alaska Dept, of Labor (Mar. 1, 1976) (emphasis in original), Edmund Orbeck, the Commissioner of Labor and one of the appellees here, issued a cease-and-desist order to all unions supplying pipeline workers 4 enjoining them “to respond to' all open job calls by dispatching all qualified Alaska residents before any non-residents are dispatched.” Ibid, (emphasis in original). As a result, the appellants, all but one of whom had previously worked on the pipeline, were prevented from obtaining pipeline-related work. Consequently, on April 28, 1976, appellants filed a complaint in the Superior Court in Anchorage seeking declaratory and injunctive relief against enforcement of Alaska Hire.
At the time the suit was filed, the provision setting forth the qualifications for Alaskan residency for purposes of Alaska
*522
Hire, Alaska Stat. Ann. § 38.40.090,
5
included a one-year durational residency requirement. Appellants attacked that requirement as well as the flat employment preference given by Alaska Hire to state residents. By agreement of the parties, consideration of a motion for a preliminary injunction was consolidated with the determination of the suit on its merits. The case was submitted on affidavits, depositions, and memo-randa of law; no oral testimony was taken. On July 21, 1976, the Superior Court upheld Alaska Hire in its entirety and denied appellants all relief. On appeal, the Alaska Supreme Court unanimously held that Alaska Hire’s one-year durational residency requirement was unconstitutional under both the state and federal Equal Protection Clauses,
*523 II
Preliminarily, we hold that this case is not moot. Despite the Alaska Supreme Court’s invalidation of the one-year durational residency requirement, a controversy still exists between at least five of the appellants- — Tommy Ray Woodruff, Frederick A. Mathers, Emmett Ray, Betty Cloud, and Joseph G. O’Brien — and the state appellees. These five appellants have all sworn that they are not residents of Alaska, Record 43, 47, 49, 96, 124. Therefore, none of them can satisfy the element of the definition of “resident” under § 38.40.090 (1) (D) that requires that an individual “has not, within the period of required residency, claimed residency in another state.” They thus have a continuing interest in restraining the enforcement of Alaska Hire’s discrimination in favor of residents of that State. 7
Appellants’ principal challenge to Alaska Hire is made under the Privileges and Immunities Clause of Art. IV, § 2: “The Citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States.” That provision, which “appears in the so-called States’ Relations Article, the same Article that embraces the Full Faith and Credit Clause, the Extradition Clause . . . , the provisions for the admission of new States, the Territory and Property Clause, and the Guarantee Clause,”
Baldwin
v.
Montana Fish and Game Comm’n,
“to place the citizens of each State upon the same footing with citizens of other States, so far as the advantages resulting from citizenship in those States are concerned. It relieves them from the disabilities of alienage in other States; it inhibits discriminating legislation against them by other States; it gives them the right of free ingress into other States, and egress from them; it insures to them in other States the same freedom possessed by the citizens of those States in the acquisition and enjoyment of property and in the pursuit of happiness; and it •secures to them in other States the equal protection of their laws. It has been justly said that no provision in the Constitution has tended so strongly to constitute the citizens of the United States one people as this.”
Appellants’ appeal to the protection of the Clause is strongly supported by this Court’s decisions holding violative of the Clause state discrimination against nonresidents seeking to ply their trade, practice their occupation, or pursue a common calling within the State. For example, in
Ward
v.
Maryland,
Again,
Toomer
v.
Witsell,
Even assuming that a State may validly attempt to alleviate its unemployment problem by requiring private employers within the State to discriminate against nonresidents — an assumption made at least dubious by Ward
9
-— it is clear that under the
Toomer
analysis reaffirmed in
Mul-laney,
Alaska Hire’s discrimination against nonresidents cannot withstand scrutiny under the Privileges and Immunities Clause. For although the statute may not violate the Clause if the State shows “something to indicate that non-citizens constitute a peculiar source of the evil at which the statute is aimed,”
Toomer
v.
Witsell, supra,
at 398, and, beyond this, the State “has no burden to prove that its laws are not violative of the . . . Clause,”
Baldwin
v.
Montana Fish and Game Gomm’n,
Moreover, even if the State’s showing is accepted as sufficient to indicate that nonresidents were “a peculiar source of evil,” Toomer and Mullmey compel the conclusion that Alaska Hire nevertheless fails to pass constitutional muster. For the discrimination the Act works against nonresidents does not bear a substantial relationship to the particular “evil” they are said to present. Alaska Hire simply grants all Alaskans, regardless of their employment status, education, or training, a flat employment preference for all jobs covered by the Act. A highly skilled and educated resident who has never been unemployed is entitled to precisely the same preferential treatment as the unskilled, habitually unemployed Arctic Eskimo enrolled in a job-training program. If *528 Alaska is to attempt to ease its unemployment problem by forcing employers within the State to discriminate against nonresidents — again, a policy which may present serious constitutional questions — the means by which it does so must be more closely tailored to aid the unemployed the Act is intended to benefit. Even if a statute granting an employment preference to unemployed residents or to residents enrolled in job-training programs might be permissible, Alaska Hire’s across-the-board grant of a job preference to all Alaskan residents clearly is not.
Relying on
McCready
v.
Virginia,
The reason is that Alaska has little or no proprietary interest in much of the activity swept within the ambit of Alaska Hire; and the connection of the State’s oil and gas with much of the covered activity is sufficiently attenuated so that it cannot justifiably be the basis for requiring private employers to discriminate against nonresidents. The extensive reach of Alaska Hire is set out in Alaska Stat. Ann. § 38.40.050 (a) (1977). That section provides:
“The provisions of this chapter apply to all employment which is a result of oil and gas leases, easements, leases or right-of-way permits for oil or gas pipeline purposes, unitization agreements [ 12 ] or any renegotiation of any of the preceding to which the state is a party after July 7, 1972; however, the activity which generates the employment must take place inside the state and it must *530 take place either on the property under the control of the person subject to this chapter or be directly related to activity taking place on the property under his control and the activity must be performed directly for the person subject to this chapter or his contractor or a subcontractor of his contractor or a supplier of his contractor or subcontractor.” (Emphasis added.)
Under this provision, Alaska Hire extends to employers who have no connection whatsoever with the State’s oil and gas, perform no work on state land, have no contractual relationship with the State, and receive no payment from the State. The Act goes so far as to reach suppliers who provide goods or services to subcontractors who, in turn, perform work for contractors despite the fact that none of these employers may themselves have direct dealings with the State’s oil and gas or ever set foot on state land.
13
Moreover, the Act’s coverage is not limited to activities connected with the extraction of Alaska’s oil and gas.
14
It encompasses, as emphasized by the dissent below, “employment opportunities at refineries and in distribution systems utilizing oil and gas obtained under Alaska leases.”
Although appellants raise no Commerce Clause challenge to the Act, the mutually reinforcing relationship between the Privileges and Immunities Clause of Art. IV, § 2, and the Commerce Clause- — a relationship that stems from their common
*532
origin in the Fourth Article of the Articles of Confederation
16
and their shared vision of federalism, see
Baldwin
v.
Montana Fish and Game Comm’n,
West, Pennsylvania
v.
West Virginia,
and
Foster Packing
thus establish that the Commerce Clause circumscribes a State’s ability to prefer its own citizens in the utilization of natural resources found within its borders, but destined for interstate commerce. Like Louisiana’s shrimp in
Foster Packing,
Alaska’s oil and gas here are bound for out-of-state consumption. Indeed, the construction of the Trans-Alaska Pipeline, on which project appellants’ nonresidency has prevented them from working, was undertaken expressly to accomplish this end.
17
Although the fact that a state-owned resource is destined for interstate commerce does not, of itself, disable the State from preferring its own citizens in the utilization of that resource, it does inform analysis under the Privileges and Immunities Clause as to the permissibility of the discrimination the State visits upon nonresidents based on its ownership of the resource. Here, the oil and gas upon
*534
which Alaska hinges its discrimination against nonresidents are of profound national importance.
18
On the other hand, the breadth of the discrimination mandated by Alaska Hire goes far beyond the degree of resident bias Alaska’s ownership of the oil and gas can justifiably support. The confluence of these realities points to but one conclusion: Alaska Hire cannot withstand constitutional scrutiny. As Mr. Justice Cardozo observed in
Baldwin
v.
G. A. F. Seelig, Inc.,
Reversed.
Notes
The regulations implementing the Act further require that all nonresidents be laid off before any resident "working in the same trade or craft” is terminated: “[T]he- nonresident may be retained only if no resident employee is qualified to fill the position.” 8 Alaska Admin. Code 35.011 (1977). See also 8 Alaska Admin. Code 35.042 (4) (1977).
The complete text of § 38.40.030 (a) is as follows:
“In order to create, protect and preserve the right of Alaska residents to employment, the commissioner of natural resources shall incorporate into all oil and gas leases, easements or right-of-way permits for oil or gas pipeline purposes, unitization agreements, or any renegotiation of any of the preceding to which the state is a party, provisions requiring the lessee to comply with applicable laws and regulations with regard to the employment of Alaska residents, a. provision requiring the employment of qualified Alaska residents, a provision prohibiting discrimination against Alaska residents and, when in the determination of the commissioner of natural resources it is practicable, a provision requiring compliance with the Alaska Plan, all in accordance with the provisions of this chapter.”
See
Trans Alaska Pipeline Rate Cases,
App. 13-14. The vast majority of pipeline jobs were filled through union dispatchment. Deposition of David Finrow, Deputy Director of the Wage and Hour Division of the Alaska Dept, of Labor, in No. 3025 (Sup. Ct. Alaska), pp. 18-19, 28, 48.
Section 38.40.090 provides:
“In this chapter
“(1) 'resident’ means a person who
“(A) except for brief intervals, military service, attendance at an educational or training institution, or for absences for good cause, is physically present in the state for a period of one year immediately before the time his status is determined;
“(B) maintains a place of residence in the state;
“(C) has established residency for voting purposes in the state;
“(D) has not, within the period of required residency, claimed residency in another state; and
“(E) shows by all attending circumstances that his intent is to make Alaska his permanent residence.”
Appellees have not cross-appealed this portion of the Alaska Supreme Court’s decision, which rests upon an independent and adequate state ground.
Murdock
v.
Memphis,
As to the remaining three appellants — Sidney S. Hieklin, Ruby E. Dorman, and Harry A. Browning — the case does appear moot. At the time this suit was instituted, all three claimed to be Alaskan residents, but none had lived in the State continuously for one year. Record 45, 51-52, 126-127. Consequently, the only aspect of Alaska Hire they challenged was the Act’s one-year durational residency requirement. When this requirement was held invalid by the Alaska Supreme Court, their controversy with the appellees seems to have terminated.
Although this Court has not always equated state residency with state citizenship, compare
Travis
v.
Yale & Towne Mfg. Co.,
Cf.
Edwards
v.
California,
For example, a report quoted in the State’s Memorandum in Opposition to Plaintiffs’ Motion for Partial Preliminary Injunction and Second Motion for Preliminary Injunction, Record 58, observed:
“The skill levels of in-migrants and seasonal workers are generally higher than those of the unemployed or under-employed resident workers. Their ability to command jobs in Alaska is a sympton of, rather than the cause of conditions resulting in high unemployment rates, particularly among Alaska Natives. Those who need the jobs the most tend to be undereducated, untrained, or living in areas of the state remote from job opportunities. Unless unemployed residents — most of whom are Eskimos and Indians' — have access to job markets and receive the education and training required to fit them into Alaska’s increasingly technological economy and unless there is a restructuring of labor demands, new jobs will continue to be filled by persons from other states who have the necessary qualifications.” Federal Field Committee for Development Planning in Alaska, Economic Outlook for Alaska 311-312 (1971) (emphasis added; footnote omitted).
At the time Alaska was admitted into the Union on January 3, 1959, 99% of all land within Alaska’s borders was owned by the Federal Government. In becoming a State, Alaska was granted and became entitled to select approximately 103 million acres of those federal lands. Alaska Statehood Law, 72 Stat. 340, § 6, note preceding 48 U. S. C. § 21. The selection process is not yet complete, but since 1959 large portions of land have been conveyed to the State, in fee, by the Federal Government. Full title to those lands and to the minerals on and below them is vested in the State. 72 Stat. 342, § 6 (i), note preceding 48 U. S. C. §21.
The term “unitization agreement” is not defined in the Act. Alaska’s Commissioner of Natural Resources gave the following definition of the term:
“Well, unitization agreement is an agreement between the operators and any given oil field as to the equity that each of them would have with respect to the oil and gas resources in that field. And in some cases that word is used to also include something called the ‘Plan of Operations’, which sets out the way in which an oil field or gas field would be operated pursuant to the State’s conservation laws.” Deposition of Guy R. Martin in No. 3025 (Sup. Ct. Alaska), p. 5.
According to one of the administrative regulations implementing Alaska Hire, “[sjuppliers shall have the same hiring requirements as an employer covered by this chapter, as to that portion of their supply business that is the result of a project or activity of a lessee, contractor or subcontractor.” 8 Alaska Admin. Code 35.080 (a) (1977).
The Commissioner of Natural Resources expressed this understanding of the scope of the Act:
Mr. Martin: "... I think it would cover relationships such as anything on a work pad or an associated construction road or possibly a site for a support camp or construction camp.”
Mr. Wagstaff (attorney for appellants): “What about things such as docks if shipping is being used?”
Mr. Martin: “I would think that it could possibly include that.” Deposition of Guy R. Martin, supra, at 4.
Heim
v.
McCall,
That Article provided: “The better to- secure and perpetuate mutual friendship and intercourse among the people of the different states in this union, the free inhabitants of each of these states, paupers, vagabonds and fugitives from justice excepted, shall be entitled to- ail privileges and immunities of free citizens in the several states; and the people of each State shall have free ingress and regress to and from any other State, and shall enjoy therein all the privileges of trade and commerce, subject to the same duties, impositions, and restrictions, as the inhabitants thereof respectively; provided, that such restrictions shall not extend so far as to prevent the removal of property, imported into any State, to any other State of which the owner is an inhabitant; provided, also that no imposition, duties or restriction, shall be laid by any State on the property of the United States, or either of them.” 9 Journal of the Continental Congress 908-909 (1777) (Library of Congress ed., 1907).
In authorizing the construction of the Trans-Alaska Pipeline, Congress expressly found that “[t]he early development and delivery of oil and gas from Alaska’s North Slope to domestic markets is in the national interest because of growing domestic shortages and increasing dependence upon insecure foreign sources.” 43 U. S. C. § 1651 (a) (1970 ed., Supp. V) (emphasis added).
In enacting the Alaska Natural Gas Transportation Act of 1976, 15 U. S. C. § 719 et seq. (1976 ed.) Congress declared:
“(1) a natural gas supply shortage exists in the contiguous States of the United States;
“(2) large reserves of natural gas in the State of Alaska could help significantly to alleviate this supply shortage;
“(3) the expeditious construction of a viable natural gas transportation system for delivery of Alaska natural gas to United States markets is in the national interest; and
“(4) the determinations whether to authorize a transportation system for delivery of Alaska natural gas to the contiguous States and, if so, which system to select, involve questions of the utmost importance respecting national energy policy, international relations, national security, and economic and environmental impact, and therefore should appropriately be addressed by the Congress and the President in addition to those Federal officers and agencies assigned functions under law pertaining to the selection, construction, and initial operation of such a system.” 15 U. S. C. § 719 (1976 ed.). See n. 17, supra.
In light of our conclusion that Alaska Hire is invalid under the Privileges and Immunities Clause of Art. IV, §2, we have no occasion to address appellants’ challenges to the Act under the Equal Protection Clause of the Fourteenth Amendment.
