Cal. Gov. Code § 21430
Upon retirement of a local safety member for industrial disability, the member shall receive in lieu of the allowance otherwise provided by this article a disability retirement allowance in the amount of the percentage of final compensation equal to the percentage of permanent disability determined by the Workers' Compensation Appeals Board for the purposes of permanent disability payments pursuant to Article 3 (commencing with Section 4650) of Chapter 2 of Part 2 of the Labor Code with respect solely to the injury resulting in the disability retirement and giving effect to Section 4750 of the Labor Code, but not less than 50 percent nor in excess of 90 percent of the member's final compensation.
This section shall not apply to any contracting agency nor to the employees of any contracting agency unless and until the agency elects to be subject to the provisions of this section by amendment to its contract made in the manner prescribed for approval of contracts, or in the case of contracts made after June 14, 1975, by express provision in such contract making the contracting agency subject to the provisions of this section.
This section shall only apply to members who retire for disability on and after the date the agency elects to be subject to this section.
Ca. Gov. Code § 21430