Section 44355 Of Article 8. Certificates And Credentials From California Education Code >> Division 3. >> Title 2. >> Part 25. >> Chapter 2. >> Article 8.

. (a) Except as provided in subdivision (b), all credentials regularly issued are valid until revoked, suspended, or expired as provided by law.
  (b) A credential issued under either of the following circumstances is void and shall be deemed to be void from the date it was issued:
  (1) A credential which would not have been issued but for a material deception or fraud committed by an applicant or by another in the applicant's behalf; or
  (2) A credential which the commission had no lawful authority to issue and which would not have been issued but for some material mistake of law or fact by either or both the applicant and the commission.
  (c) A notice that a credential is void pursuant to paragraph (1) or (2) of subdivision (b) shall be served upon the credential holder at his or her last known address as provided in Section 1013 of the Code of Civil Procedure. Within 30 days thereafter, such notice may be appealed to the commission only on the grounds that there was no fraud, material deception, or error and that the commission had the lawful authority to issue the credential on the facts stated in the application.