California Code, Revenue and Taxation Code - RTC § 30435

(a) An employee of the board, upon presentation of the appropriate identification and credentials, is authorized to enter into, and conduct an inspection of any building, facility, site, or place described in subdivision (b).

(b) Any building, facility, site, or place at which cigarette or tobacco products are sold, produced, or stored, or any building, facility, site, or place for which there is evidence of either the evasion of the taxes imposed under this part, or the failure to comply with the requirements of the Master Settlement Agreement, as defined in subdivision (e) of Section 104556 of the Health and Safety Code, including, but not limited to, Section 30165.1.

(c) Any inspection performed under the authority of this section shall be performed in a reasonable manner and at a reasonable time, taking into consideration the normal business hours of the building, facility, site, or place that is inspected.

(d) Any person that refuses to allow an inspection authorized under this section is subject to the penalty imposed by Section 30471.