California Code, Business and Professions Code - BPC § 7664

Certificates of apprenticeship issued pursuant to this article shall expire when the holder has been issued a license as an embalmer, or six years from the date of registration, whichever first occurs.  The certificates may not be renewed, but an apprentice embalmer who has not completed his or her term of apprenticeship at the time his or her certificate expires may apply for reregistration upon compliance with Section 7661.  The bureau may, when the circumstances warrant, allow an apprentice credit under a reregistration for the time actually served under a previous registration, but no reregistration shall have the effect of continuing the term of apprenticeship beyond the period specified in Section 7666.