Cal. Bus. & Prof. Code § 7145
The registrar may refuse to renew a license for the failure or refusal by the licensee to complete the renewal application prescribed by the registrar. If a licensee fails to return an application for renewal which was rejected for insufficiency or incompleteness within 90 days from the original date of rejection, the application and fee shall be deemed abandoned. Any application abandoned may not be reinstated. However, the applicant may file another application accompanied by the required fee.
The registrar may review and accept the petition of a licensee who disputes the invalidation of his or her application for renewal upon a showing of good cause. This petition shall be received within 90 days from the date the renewal application is deemed abandoned.
Ca. Bus. and Prof'l. Code § 7145