California Code, Business and Professions Code - BPC § 8652

Failure of a registered company to make and keep all inspection reports, field notes, contracts, documents, notices of work completed, and records, other than financial records, for a period of not less than three years after completion of any work or operation for the control of structural pests or organisms, is a ground for disciplinary action.  These records shall be made available to the executive officer of the board or his or her duly authorized representative during business hours.