(1) In order to maintain the program cost within the cost neutrality limitation necessary for compliance with the federal legal authorization for the implementation of the program, the cost of plans of care for enrolled youth are collectively and individually subject to limitation in accordance with federal and state authorities and this rule.

(2) The calculated cost to implement a plan of care for a youth may not exceed a sum calculated by dividing the total sum of monies available through legislative appropriation for funding during the current fiscal year by the number of service opportunities to be made available through the program during the fiscal year. The total annual sum of expenditures for program services and state plan services provided to a youth may not exceed a maximum amount set at 100% of the average individual cost calculated by the department to treat a resident of a psychiatric residential treatment facility in Montana.

(3) The cost of services to be provided under a youth's plan of care is determined prior to implementation of the proposed plan of care and may be revised as necessary after implementation.

(4) The cost determination for the services provided under a youth's plan of care may be revised at any time there is a significant revision in the plan of care or in the cost of the services being reimbursed through the program.