|"United States Federal
"Civil Procedure doctrines
In United States law, a "federal enclave" is a parcel of federal property within a "state that is under the "Special Maritime and Territorial Jurisdiction of the United States." As of 1960, the year of the latest comprehensive inquiry, seven percent of federal property had enclave status, of which four percent (almost all in Alaska and Hawaii) was under "concurrent" state jurisdiction. The remaining three percent, on which some state laws do not apply, is scattered almost at random throughout the United States. In 1960, there were about 5,000 enclaves, with about one million people living on them. These numbers would undoubtedly be lower today because many of these areas were "military bases that have been closed and transferred out of federal ownership.
Since the 1953 Howard v. Commissioners case the "Supreme Court has held that the collection of city and state taxes from federal enclave residents is permissible, establishing the "Friction Not Fiction" doctrine.
Residents of federal enclaves have the right to vote in the elections of the "state in which the federal enclave is situated. This is based on the "Friction Not Fiction" doctrine, and was challenged by a Maryland law in 1968, the subject of the case "Evans v. Cornman. The case was decided by the Supreme Court in 1970, and overruled the Maryland law, upholding the voting rights of enclave residents and establishing that they should be regarded as residents of the state in question.
Federal enclaves are to be distinguished from "federal territories and possessions administered under Article IV, Section 3, Clause 2, which once included all the territory that has since become states, and still includes insular territories like "Puerto Rico, the "United States Virgin Islands, "Guam, "American Samoa, and a few others. Historically, the "Congress has not exercised a full array of state-like powers over such territories, but tried to organize them into self-governing entities, as was done with the "Northwest Ordinance and the "Southwest Ordinance.
The first federal enclaves were created by the same clause of the Constitution that created the "District of Columbia. That clause provides for the United States to exercise "exclusive Legislation" over the new Seat of Government and "like authority" over:
As a result of the Enclave Clause, whenever the state government consented to the purchase of property by the "federal government for a needful building, the United States obtained exclusive legislative "jurisdiction over that parcel of property. In 1841, the "Congress enacted a general law requiring state consent for all federal building projects. Moreover, the Attorneys General of the United States ruled that, in consenting to purchase, the States could reserve no jurisdiction except for the service of criminal and civil process." 
In 1885, the "Supreme Court ruled that there were two additional ways in which the United States could acquire federal enclaves: (1) the states could "cede" legislative jurisdiction to the United States, and (2) the United States could "reserve" legislative jurisdiction at the time of statehood. The Supreme Court added that these "cessions" and "reservations" were not limited to Enclave Clause ("needful building") purposes.
Because "state laws did not apply to federal enclaves, Congress provided a few basic criminal laws in the Federal Crimes Act of 1790, and later adopted a series of "Assimilative Crimes Acts, "federalizing" each state's crimes by making them prosecutable in federal courts.
Congress provided no "civil laws to govern these enclaves. So in 1885, the Supreme Court held that the ""international law rule," applied. That rule provides that when a territory is transferred from one government to another (such as when a federal enclave is ceded), laws for the protection of private rights continue in force until abrogated or changed by the new government.
Under the "doctrine of extraterritoriality, a federal enclave was treated as a "state within a state" until 1953, and therefore enclave residents were not residents of the state. They could not vote in state elections, attend public schools, obtain a divorce in state courts, or call upon state law enforcement officers to protect them from criminals.
Nevertheless, Congress gradually authorized the enforcement of some state laws on federal enclaves. Thus, in 1928, Congress made applicable to federal enclaves state laws governing wrongful death and personal injuries. And in the late 1930s Congress authorized states to apply their state taxes on fuel, income, sales and use (the "Buck Act"), and state laws governing worker's compensation and unemployment insurance.
In 1937, because of concern over the lack of state law on federal enclaves, the Supreme Court held that the states could reserve some jurisdiction to themselves in consenting to federal legislative jurisdiction. In response, the states began to amend their "consent" and "cession" statutes to reserve state jurisdiction, including the power to tax enclave residents.
To distinguish earlier "exclusive" jurisdiction enclaves from those acquired after the state amendments, the newer enclaves were labeled "partial" jurisdiction, and the label "concurrent" was given to enclaves over which the state had full jurisdiction. Finally, non-enclave federal property was called, "Proprietorial Interest Only." 
Effective February 1, 1940, Congress repealed the 1841 statute requiring state consent to federal purchases, and instead said that the acquisition of federal property after that date, would no longer result in the transfer of jurisdiction to the United States unless the head of the federal agency in charge of the property filed a notice with the state governor accepting whatever jurisdiction was offered by the state. However, during "World War II, the United States acquired many new military installations, and the "Secretary of War sent numerous letters to state governors accepting whatever jurisdiction the state offered, often without describing the location or boundaries of these military installations.
After World War II, the states began to apply state laws to enclave residents without waiting for Congress to act. Thus, in 1952, a California court gave enclave residents the right to vote in state elections, rejecting the "extraterritoriality" doctrine, and holding that enclave residents were residents of the state. In 1970, the Supreme Court agreed, in "Evans v. Cornman, holding that all enclave residents have a right to vote in state elections.
In 1950, without addressing the jurisdictional issue directly, Congress passed legislation providing federal financial aid to schools in localities impacted by federal facilities. Six years later, in 1956, the government reported that because of this federal aid, "not a single child is being denied the right to a public school education because of his residence on a federal enclave."
Earlier, courts in "Kansas, "Georgia, and "New Mexico held they had no jurisdiction to grant divorces to residents of federal enclaves. But after each state amended its divorce statutes to permit such divorces, court decisions in each state upheld the validity of these statutes. Today, every state treats enclave residents as residents of the state for purposes of divorce proceedings.
The "extraterritoriality doctrine was abolished by the Supreme Court in 1953 in Howard v. Commissioners. The city of "Louisville, Kentucky, had annexed a federal enclave into its city limits, thereby allowing the collection of city taxes from enclave residents under the Buck Act. Residents of the enclave argued that the annexation was improper because the federal enclave "ceased to be a part of Kentucky when the United States assumed exclusive jurisdiction over it." The Supreme Court rejected the argument, holding that the annexation did not interfere with federal functions, and what was important was "friction, not fiction":
A change of municipal boundaries did not interfere in the least with the jurisdiction of the United States within the area or with its use or disposition of the property. The fiction of a state within a state can have no validity to prevent the state from exercising its power over the federal area within its boundaries, so long as there is no interference with the jurisdiction asserted by the Federal Government. The sovereign rights in this dual relationship are not antagonistic. Accommodation and cooperation are their aim. It is friction, not fiction, to which we must give heed.
In 1956, three years after Howard v. Commissioners, the Supreme Court in Offutt Housing Co. v. Sarpy County upheld Congress' power to authorize the application of state laws to federal enclaves without a "relinquishment" of jurisdiction. In affirming the state's right to tax a private builder of military housing, the Supreme Court emphasized that the Congress' authorization for state taxation on enclave property was not a retrocession: "We do not hold that Congress has relinquished this power over these areas. We hold only that Congress, in the exercise of this power, has permitted such state taxation as is involved in the present case."
Federal government reports in 1956 and 1957 concluded that the states should have full "concurrent jurisdiction on all federal enclaves. In 1969, the "Public Land Law Review Commission published a report on developments since the 1956 and 1957 reports, observing that those reports had been successful in changing federal agency policy and limiting further acquisition of federal enclaves. The 1969 report said that in 1960, there were about 5,000 enclaves with about a million people living on them. These numbers have never been updated, but they would certainly be lower today, because many military bases have been closed, and jurisdiction over most off-base housing areas has been transferred to the states.
In 1970, a year after the 1969 Report, the Supreme Court in "Evans v. Cornman unanimously held that enclave residents have a right to vote in state elections. In reaching this result, Evans reiterated the "friction not fiction" doctrine of Howard v. Commissioners, and reaffirmed that enclave residents should be regarded as residents of the state.
Evans also unanimously reaffirmed the holding in Offutt Housing that Congress could give the states jurisdiction without relinquishing enclave status. The court relied in part on the fact that Congress had authorized the states to enforce many state laws on federal enclaves.
Some criminal laws have also been authorized by Congress to apply on federal enclaves, including "immigrant stations" and "Job Corps Centers. In addition, the states' power to enforce their tax laws on federal enclaves necessarily includes the power to prosecute enclave residents criminally for violating those laws.
Under Evans, Congress has the power, if it chooses, to authorize the enforcement of all state laws on federal enclaves. It need not "retrocede" or "relinquish" federal jurisdiction. Instead, it can—to use Offutt Housing's language—simply "permit" all state laws to apply to all federal property regardless of "federal enclave" status.
In addition, the "friction not fiction" doctrine indicates that the courts can approve the application state laws to federal enclaves to the same extent that they apply to the other 97 percent of federal lands (i.e., subject only to the limitations of the "Supremacy Clause). With regard to the states' ability unilaterally to apply their laws on federal enclaves, Evans noted that enclave residents:
are required to register their automobiles in Maryland and obtain driver's permits and license plates from the State; they are subject to the process and jurisdiction of State courts; they themselves can resort to those courts in divorce and child adoption proceedings; and they send their children to Maryland public schools.
In addition to these laws mentioned by Evans, such court-applied laws include state "probate laws, public welfare laws, laws relating to "mentally ill persons, "juvenile delinquency, protection of abused and neglected children, and "domestic violence "restraining orders.
Nevertheless, there are other cases which hold that some "state laws do not apply on enclaves, including most state "criminal laws, "liquor laws, "personal property taxes, some utility regulations, "human rights laws, "anti-discrimination laws, racial discrimination laws, "whistleblower laws, state occupational safety and health (OSHA) laws, "wage and "hour laws, and "right-to-work laws.
Many of these decisions are based on the "extraterritoriality doctrine that was abolished by Howard and Evans. They often rely "on dicta in the "Supreme Court's 1973 "Mississippi Tax I opinion" (United States v. State Tax Commission of Mississippi) which ignored Howard and Evans and instead favorably quoted the district court's assertion that enclaves are "foreign land" and "federal islands which no longer constitute any part of Mississippi nor function under its control."
Nevertheless, Mississippi Tax I's holding—that the "Twenty-first Amendment did not authorize a state "markup" on liquor—made it unnecessary to discuss enclave jurisdiction, so the "foreign lands" language was quite unnecessary. On the other hand, in 1990, the Supreme Court treated Mississippi Tax I as an enclave case, citing it for the proposition that a state has no authority to regulate a transaction between an out-of-state liquor supplier and a federal military base under exclusive federal jurisdiction.
Still, no court has suggested that Mississippi Tax I changed the "friction not fiction" rule of Howard and Evans. The "Texas Court of Appeals noted the conflict and followed the "friction not fiction" rule in holding that the federal enclave at "Red River Army Depot was part of "Texas for state tax purposes. In upholding a state tax on aircraft parts, the court distinguished Mississippi Tax I on the ground that unlike the liquor markup in that case, in Aviall Services, Inc. v. Tarrant Appraisal Dist.:
[T]here was no interference with federal jurisdiction by the taxing entities; hence, no friction. Therefore, we will not apply the fiction that the Depot was a foreign country or a sister state to deem that the aviation parts were shipped by Aviall "outside the state" when they were shipped to a location in Bowie County near Texarkana, within the geographic limits of Texas.
Similarly, the "California Court of Appeal has acknowledged Mississippi Tax I's statements about the enclave clause with regard to state liquor regulations, but nevertheless relied on Howard and Evans to hold that the enclave clause did not prevent the application of state laws protecting dependent children.
For many years, it was believed that "the vast majority" of National Forests were not federal enclaves. However, federal appeals courts in North Carolina, Michigan, and Oklahoma have recently ruled that "cession" statutes in each of those states ceded concurrent jurisdiction over National Forest lands acquired by the United States before February 1, 1940. Depending on the wording of "cession" statutes in other states, these cases may mean that the United States has considerable concurrent "enclave" jurisdiction in National Forests.