Cal. Financial Code § 14250

(a) (1) The commissioner may at any time investigate into the affairs and examine the books, accounts, records, files, and any office within or outside of this state used in the business of every credit union, whether it acts or claims to act under or without authority of this division. (2) The commissioner and the commissioner’s duly designated representatives shall have free access to the offices and places of business, books, accounts, papers, records, files, safes, and vaults of a credit union referred to in paragraph (1). (3) The officers and employees of a credit union being examined shall exhibit to the examiners, on request, any or all of its securities, books, records, and accounts and shall otherwise cooperate with the examination so far as it is in their power. (b) (1) The commissioner shall examine every credit union organized under the laws of this state to the extent and whenever and as often as the commissioner shall deem it advisable but in no case less than once every two years. (2) For purposes of this subdivision, an examination made by the commissioner in conjunction with or with assistance from the National Credit Union Administration or a credit union regulatory agency of another state of the United States is deemed to be an examination made by the commissioner. (3) For purposes of this subdivision, an examination made by the National Credit Union Administration pursuant to an alternating examination schedule approved by both the commissioner and the National Credit Union Administration is deemed to be an examination made by the commissioner. (4) This subdivision does not require the commissioner to make an examination onsite at the offices of a credit union.