Welf. & Inst. Code, § 912

(a) A county from which a person is committed to the Department of Corrections and Rehabilitation, Division of Juvenile Facilities, shall pay to the state an annual rate of twenty-four thousand dollars ($24,000) while the person remains in an institution under the direct supervision of the division, or in an institution, boarding home, foster home, or other private or public institution in which the person is placed by the division, and cared for and supported at the expense of the division, as provided in this subdivision. This subdivision applies to a person who is committed to the division by a juvenile court on or after July 1, 2012.

The Department of Corrections and Rehabilitation, Division of Juvenile Facilities, shall present to the county, not more frequently than monthly, a claim for the amount due to the state under this subdivision, which the county shall process and pay pursuant to Chapter 4 (commencing with Section 29700) of Division 3 of Title 3 of the Government Code.

(b) A county from which a person is committed to the Department of Corrections and Rehabilitation, Division of Juvenile Facilities, on or after July 1, 2018, shall pay to the state an annual rate of twenty-four thousand dollars ($24,000) for the time the person remains in an institution under the direct supervision of the division, or in an institution, boarding home, foster home, or other private or public institution in which the person is placed by the division, and cared for and supported at the expense of the division, as provided in this subdivision. A county shall not pay the annual rate of twenty-four thousand dollars ($24,000) for a person who is 23 years of age or older. This subdivision applies to a person committed to the division by a juvenile court on or after July 1, 2018.

(c) A county from which a person is committed to the Department of Corrections and Rehabilitation, Division of Juvenile Justice, on or after July 1, 2021, shall pay to the state an annual rate of one-hundred and twenty-five thousand dollars ($125,000) for the time the person remains in an institution under the direct supervision of the division, or in an institution, boarding home, foster home, or other private or public institution in which the person is placed by the division, and cared for and supported at the expense of the division, as provided in this subdivision. A county shall not pay the annual rate of one-hundred and twenty-five thousand dollars ($125,000) for a person who is 23 years of age or older. This subdivision applies to a person committed to the division by a juvenile court on or after July 1, 2021.

(d) Consistent with Article 1 (commencing with Section 6024) of Chapter 5 of Title 7 of Part 3 of the Penal Code, the Board of State and Community Corrections shall collect and maintain available information and data about the movement of juvenile offenders committed by a juvenile court and placed in any institution, boarding home, foster home, or other private or public institution in which they are cared for, supervised, or both, by the division or the county while they are on parole, probation, or otherwise.