The board of supervisors may in its discretion establish:
The maximum amount of indebtedness that any probationer may incur through loans from such fund shall be determined by the board of supervisors. Where any probationer has borrowed less than the maximum amount set by the board of supervisors or has borrowed and repaid all or part of a loan, the county probation officer may make additional loans to him until he has incurred such maximum amount of indebtedness.
Ca. Gov. Code § 25252.5