(b) If it is determined, pursuant to subdivision (a) or at any later date, that a foster child should be disenrolled from a county organized health system due to an out-of-county placement, the county child welfare agency or probation department with responsibility for the care and placement of the child shall request that the child be disenrolled from the county organized health system. The request shall be made to the entity designated by the State Department of Health Care Services to receive requests for disenrollment or to the department, if the department has no designee, no later than one working day after either of the following occurs:

1. (1) The out-of-county placement begins.
2. (2) It is determined that a child who initially remained enrolled in the county organized health system following the out-of-county placement, pursuant to subdivision (a), should subsequently be disenrolled.