California Code, Health and Safety Code - HSC § 1597.059

(a) The State Department of Social Services shall adopt guidelines and procedures to permit an aide to assist a fully qualified child care teacher in the supervision of up to 18 preschool age children, with the requirement that the aide shall complete at least two accredited postsecondary semester units or equivalent quarter units of early childhood education or child development per semester or quarter, commencing with the first semester or quarter following initial employment and continuing until six units have been completed.

(b) For purposes of this section, “preschool age children” means children who are enrolled in a child day care center licensed by the department and who are not enrolled in either an infant care center or a schoolage child day care center, as these terms are defined in Title 22 of the California Code of Regulations.

(c) This section shall not become operative prior to June 30, 1993.