California Code, Business and Professions Code - BPC § 22456

A certificate of registration shall be effective for a period of two years or until the date the bond expires, whichever occurs first. Thereafter, a registrant shall file a new certificate of registration or a renewal of the certificate of registration and pay the fee required by Section 22453.A certificate of registration may be renewed up to 60 days prior to its expiration date and the effective date of the renewal shall be the date the current registration expires. The renewal shall be effective for a period of two years from the effective date or until the expiration date of the bond, whichever occurs first.