43 USC 1733 - Enforcement authority

(a) Regulations for implementation of management, use, and protection requirements; violations; criminal penalties 
The Secretary shall issue regulations necessary to implement the provisions of this Act with respect to the management, use, and protection of the public lands, including the property located thereon. Any person who knowingly and willfully violates any such regulation which is lawfully issued pursuant to this Act shall be fined no more than $1,000 or imprisoned no more than twelve months, or both. Any person charged with a violation of such regulation may be tried and sentenced by any United States magistrate judge designated for that purpose by the court by which he was appointed, in the same manner and subject to the same conditions and limitations as provided for in section 3401 of title 18.
(b) Civil actions by Attorney General for violations of regulations; nature of relief; jurisdiction 
At the request of the Secretary, the Attorney General may institute a civil action in any United States district court for an injunction or other appropriate order to prevent any person from utilizing public lands in violation of regulations issued by the Secretary under this Act.
(c) Contracts for enforcement of Federal laws and regulations by local law enforcement officials; procedure applicable; contract requirements and implementation 

(1) When the Secretary determines that assistance is necessary in enforcing Federal laws and regulations relating to the public lands or their resources he shall offer a contract to appropriate local officials having law enforcement authority within their respective jurisdictions with the view of achieving maximum feasible reliance upon local law enforcement officials in enforcing such laws and regulations. The Secretary shall negotiate on reasonable terms with such officials who have authority to enter into such contracts to enforce such Federal laws and regulations. In the performance of their duties under such contracts such officials and their agents are authorized to carry firearms; execute and serve any warrant or other process issued by a court or officer of competent jurisdiction; make arrests without warrant or process for a misdemeanor he has reasonable grounds to believe is being committed in his presence or view, or for a felony if he has reasonable grounds to believe that the person to be arrested has committed or is committing such felony; search without warrant or process any person, place, or conveyance according to any Federal law or rule of law; and seize without warrant or process any evidentiary item as provided by Federal law. The Secretary shall provide such law enforcement training as he deems necessary in order to carry out the contracted for responsibilities. While exercising the powers and authorities provided by such contract pursuant to this section, such law enforcement officials and their agents shall have all the immunities of Federal law enforcement officials.

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(2) The Secretary may authorize Federal personnel or appropriate local officials to carry out his law enforcement responsibilities with respect to the public lands and their resources. Such designated personnel shall receive the training and have the responsibilities and authority provided for in paragraph (1) of this subsection.
(d) Cooperation with regulatory and law enforcement officials of any State or political subdivision in enforcement of laws or ordinances 
In connection with the administration and regulation of the use and occupancy of the public lands, the Secretary is authorized to cooperate with the regulatory and law enforcement officials of any State or political subdivision thereof in the enforcement of the laws or ordinances of such State or subdivision. Such cooperation may include reimbursement to a State or its subdivision for expenditures incurred by it in connection with activities which assist in the administration and regulation of use and occupancy of the public lands.
(e) Uniformed desert ranger force in California Desert Conservation Area; establishment; enforcement of Federal laws and regulations 
Nothing in this section shall prevent the Secretary from promptly establishing a uniformed desert ranger force in the California Desert Conservation Area established pursuant to section 1781 of this title for the purpose of enforcing Federal laws and regulations relating to the public lands and resources managed by him in such area. The officers and members of such ranger force shall have the same responsibilities and authority as provided for in paragraph (1) of subsection (c) of this section.
(f) Applicability of other Federal enforcement provisions 
Nothing in this Act shall be construed as reducing or limiting the enforcement authority vested in the Secretary by any other statute.
(g) Unlawful activities 
The use, occupancy, or development of any portion of the public lands contrary to any regulation of the Secretary or other responsible authority, or contrary to any order issued pursuant to any such regulation, is unlawful and prohibited.