California Code, Labor Code - LAB § 1406

(a) In any investigation or proceeding under this chapter, the Labor Commissioner has, in addition to all other powers granted by law, the authority to examine the books and records of an employer.

(b) The Labor Commissioner may enforce the notice requirements in Section 1401 and subdivision (a) of Section 1410, including investigating an alleged violation and ordering appropriate temporary relief to mitigate the violation pending the completion of a full investigation or hearing, through the procedures set forth in Section 98.3 or 1197.1, including by issuance of a citation against an employer who violates this chapter.  If a citation is issued, the procedures for issuing, contesting, and enforcing judgments for citations and civil penalties issued by the commissioner shall be the same as those set forth in Section 1197.1, as appropriate.