California Code, Harbors and Navigation Code - HNC § 768

(a) The department may suspend or revoke any license issued pursuant to this article on a finding that the licensee has violated any of the provisions in this chapter, or has violated any of the regulations promulgated pursuant to carrying out the provisions of this article.  The department may also revoke any license issued pursuant to this article upon any of the grounds which authorize the refusal to issue a license.

If the department suspends or revokes an operator's license, the proceedings shall be in accordance with Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code, and in all cases the department shall have all the powers granted therein.

(b) The period of time for suspension during which the person may not apply for his license shall be determined by the department.  The department shall not renew an operator's license which has been revoked until the expiration of one year after the date of such revocation unless the revocation was for a cause which has been removed.