California Code, Business and Professions Code - BPC § 25755

(a) The director and the persons employed by the department for the administration and enforcement of this division are peace officers in the enforcement of the penal provisions of this division, the rules of the department adopted under the provisions of this division, and any other penal provisions of law of this state prohibiting or regulating the sale, exposing for sale, use, possession, giving away, adulteration, dilution, misbranding, or mislabeling of alcoholic beverages or intoxicating liquors, and these persons are authorized, while acting as peace officers, to enforce any penal provisions of law while in the course of their employment.

(b) The director, the persons employed by the department for the administration and enforcement of this division, peace officers listed in Section 830.1 of the Penal Code, and those officers listed in Section 830.6 of the Penal Code while acting in the course and scope of their employment as peace officers may, in enforcing the provisions of this division, visit and inspect the premises of any licensee at any time during which the licensee is exercising the privileges authorized by his or her license on the premises.

(c) Peace officers of the Department of the California Highway Patrol, members of the University of California and California State University police departments, and peace officers of the Department of Parks and Recreation, as defined in subdivisions (a), (b), (c), and (f) of Section 830.2 of the Penal Code, may, in enforcing this division, visit and inspect the premises of any licensee located on state property at any time during which the licensee is exercising the privileges authorized by his or her license on the premises.

(d) Any agents assigned to the Drug Enforcement Narcotics Team by the director shall have successfully completed a four-week course on narcotics enforcement approved by the Commission on Peace Officer Standards and Training. In addition, all other agents of the department shall successfully complete the four-week course on narcotics enforcement approved by the Commission on Peace Officer Standards and Training by June 1, 1995.