; and (4) conduct investigations of offenses against the United States committed on Federal land in the absence of investigation of the offenses by any other Federal law enforcement agency having investigative jurisdiction over the offense committed or with the concurrence of the other agency. (c) Indemnify and save harmless The Secretary concerned shall waive, in any agreement under subsection (a) with a State or unit of local government, all civil claims against the State or unit of local government and, subject to available appropriations, indemnify and save harmless the State or unit of local government from all claims by third parties for property damage or personal injury, that may arise out of law enforcement functions performed under the agreement. (d) Law enforcement personnel not deemed federal employees (1) In general Except as otherwise provided in this subsection, a law enforcement officer of a State or unit of local government performing law enforcement functions pursuant to an agreement under subsection (a) shall not be deemed a Federal employee and shall not be subject to the provisions of law relating to Federal employment, including those relating to hours of work, rates of compensation, leave, unemployment compensation, and Federal benefits. (2) Exceptions A law enforcement officer of a State or unit of local government performing law enforcement functions pursuant to an agreement under subsection (a) is deemed to be— (A) a Federal employee for purposes of sections 1346(b) and 2401(b) and chapter 171 of title 28, United States Code