California Code, Business and Professions Code - BPC § 2457

The failure of any person holding a certificate issued by the Osteopathic Medical Board of California to pay the biennial license fee during the time his or her certificate remains in force shall automatically work a forfeiture of his or her certificate after a period of 60 days from the date of expiration.

The certificate shall not be restored except upon written application and the payment to the Osteopathic Medical Board of California of the fee provided by this article.  No examination shall be required for the reissuance of a certificate that was forfeited under the provisions of this section.