16 U.S.C. § 24 : US Code - Section 24: Jurisdiction over park; fugitives from justice

Search 16 U.S.C. § 24 : US Code - Section 24: Jurisdiction over park; fugitives from justice

The Yellowstone National Park, as its boundaries now are defined,
or as they may be hereafter defined or extended, shall be under the
sole and exclusive jurisdiction of the United States. All the laws
applicable to places under the sole and exclusive jurisdiction of
the United States, shall have force and effect in said park.
Nothing in this Act shall be construed to forbid the service in the
park of any civil or criminal process of any court having
jurisdiction in the States of Idaho, Montana, and Wyoming. All
fugitives from justice taking refuge in said park shall be subject
to the same laws as refugees from justice found in the State of
Wyoming.