California Code, Financial Code - FIN § 14553

(a) The supervisory committee shall at least once each year make or cause to be made an audit of the books and records and an examination of the business and affairs of the credit union. The supervisory committee shall make a full report of the assets and liabilities, receipts and disbursements of the credit union to the board of directors. Those reports shall be presented at the annual meeting of members and filed with the records of the credit union.

(b) The supervisory committee may make or cause to be made any supplementary inspections of the securities, cash, and accounts of the credit union or audits as it deems necessary, and submit reports of those audits to the board of directors.