California Code, Fish and Game Code - FGC § 392

(a) The director, or a designated representative, may enter into reciprocal operational agreements with authorized representatives of any Oregon, Nevada, or Arizona state law enforcement agency, including, but not limited to, the Oregon State Police, the Nevada Department of Wildlife, and the Arizona Game and Fish Department, to promote expeditious and effective law enforcement service to the public, and assistance between the members of the department and those agencies, in areas adjacent to the borders of this state and each of the adjoining states pursuant to Section 393.

(b) The reciprocal operational agreement shall be in writing and may cover the reciprocal exchange of law enforcement services, resources, facilities, and any other necessary and proper matters between the department and the respective agency.

(c) Any agreement shall specify all of the following:

(d) The director may establish operational procedures in implementation of any reciprocal operational agreement that are necessary to achieve the purposes of the agreement.