Cal. Government Code § 19994

(a) When the state takes over and there is transferred to it a function from any other public agency, the department may determine the extent, if any, to which the employees employed by the other public agency on the date of transfer are entitled to have credited to them in the state civil service, seniority credits, accumulated sick leave, and accumulated vacation because of service with the former agency. Granting of seniority credit under this section is subject to review by the State Personnel Board pursuant to Section 19816.2. (b) The department shall limit that determination to the time any transferred employees were employed in the specific function or a function substantially similar while in the former agency and the seniority credits and accumulated sick leave and accumulated vacation shall not exceed that to which each employee would be entitled if he or she had been continuously employed by the State of California. This section is applicable to any function heretofore transferred to the state, whether by state action or otherwise, as well as to any future transfers of a function to the state, whether by state action or otherwise.