25 C.F.R. § 11.306 Search without a warrant.
Title 25 - Indians
No law enforcement officer shall conduct any search without a valid warrant except: (a) Incident to making a lawful arrest; or (b) With the voluntary consent of the person being searched; or (c) When the search is of a moving vehicle and the officer has probable cause to believe that it contains contraband, stolen property, or property otherwise unlawfully possessed.
Title 25: Indians
PART 11—LAW AND ORDER ON INDIAN RESERVATIONS
Subpart C—Criminal Procedure
§ 11.306 Search without a warrant.