Government Code § 22553
ARTICLE 2. Administrative Cost Assessment and Financial Obligations
Each public agency included in the agreement between the board and the federal agency pursuant to the provisions of this part shall be liable for the contributions required of an employer under the provisions of Section 3111 of the Internal Revenue Code of 1954 and the portion required to be withheld from the salaries and wages of the employees as required under the provisions of Section 3101 of the Internal Revenue Code of 1954.