Cal. Lab. Code § 4850.3
A city, county, special district, or harbor district that is a member of the Public Employees' Retirement System, is subject to the County Employees Retirement Law of 1937, or is subject to the Los Angeles City Employees' Retirement System, may make advanced disability pension payments to any local safety officer who has qualified for benefits under Section 4850 and is approved for a disability allowance. The payments shall be no less than 50 percent of the estimated highest average annual compensation earnable by the local safety officer during the three consecutive years of employment immediately preceding the effective date of his or her disability retirement, unless the local safety officer chooses an optional settlement in the permanent disability retirement application process which would reduce the pension allowance below 50 percent. In the case where the local safety officer's choice lowers the disability pension allowance below 50 percent of average annual compensation as calculated, the advanced pension payments shall be set at an amount equal to the disability pension allowance. If a local agency has an adopted policy of paying for any accumulated sick leave after the safety officer is eligible for a disability allowance, the advanced disability pension payments under this section may only be made when the local safety officer has exhausted all sick leave payments. Advanced disability pension payments shall not be considered a salary under this or any other provision of law. All advanced disability pension payments made by a local agency with membership in the Public Employees' Retirement System shall be reimbursed by the Public Employees' Retirement System pursuant to Section 21293.1 of the Government Code.
Ca. Lab. Code § 4850.3