(a)
If it is necessary that provision be made for the expense of support and maintenance of a ward or dependent child of the juvenile court or of a minor person concerning whom a petition has been filed in accordance with the provisions of this chapter, the order providing for the care and custody of such ward, dependent child or other minor person shall direct that the whole expense of support and maintenance of such ward, dependent child or other minor person, up to the amount of twenty dollars ($20) per month be paid from the county treasury and may direct that an amount up to any maximum amount per month established by the board of supervisors of the county be so paid. The board of supervisors of each county is hereby authorized to establish, either generally or for individual wards or dependent children or according to classes or groups of wards or dependent children, a maximum amount which the court may order the county to pay for such support and maintenance. All orders made pursuant to the provisions of this section shall state the amounts to be so paid from the county treasury, and such amounts shall constitute legal charges against the county.
(b)
This section is applicable to a minor who is the subject of a program of supervision undertaken by the probation department pursuant to Section 330 or 654 and who is temporarily placed out of his home by the probation department, with the approval of the court and the minor’s parent or guardian, for a period not to exceed seven days.