California Code, Code of Civil Procedure - CCP § 1822.59

(a) Notwithstanding the provisions of Section 1822.54, for purposes of an animal or plant pest or disease eradication effort pursuant to Division 4 (commencing with Section 5001) or Division 5 (commencing with Section 9101) of the Food and Agricultural Code, the judge may issue a warrant under the requirements of this title describing a specified geographic area to be inspected by authorized personnel of the Department of Food and Agriculture.

(b) A warrant issued pursuant to this section may only authorize the inspection of the exterior of places, dwellings, structures, premises or vehicles, and only in areas urban in character. The warrant shall state the geographical area which it covers and the purpose of and limitations on the inspection.

(c) A warrant may be issued pursuant to this section whether or not the property owners in the area have refused to consent to the inspection. A peace officer may use reasonable force to enter a property to be inspected if so authorized by the warrant.