Cal. Education Code § 22461

(a) Upon retaining the services of a retired member under Section 24114, 24116, 24214, 24214.5, or 24215, the school district, community college district, county superintendent of schools, California State University, or other employing agency shall do both of the following regardless of whether the retired member performs the services as an employee of the employer, an employee of a third party, or an independent contractor: (1) Advise the retired member of the earnings limitation or employment restriction set forth in Sections 22714, 24114, 24116, 24214, 24214.5, and 24215. (2) Maintain accurate records of the retired member’s earnings and report those earnings monthly to the system and the retired member regardless of the method of payment or the fund from which the payments were made. (b) This section shall not be construed to make any school district, community college district, county superintendent of schools, the California State University, or other employing agency liable for any amount paid to the retired member in excess of the earnings limitation under any circumstance, including the failure to inform the retired member that continuation of service would exceed the limitations.