California Code, Education Code - EDC § 87482.5

(a) Notwithstanding any other law, a person who is employed to teach adult or community college classes for not more than 67 percent of the hours per week considered a full-time assignment for regular employees having comparable duties shall be classified as a temporary employee, and shall not become a contract employee under Section 87604.If the provisions of this section are in conflict with the terms of a collective bargaining agreement in effect on or before January 1, 2009, the provisions of this section shall govern the employees subject to that agreement upon the expiration of the agreement.

(b) Service as a substitute on a day-to-day basis by persons employed under this section shall not be used for purposes of calculating eligibility for contract or regular status.