For purposes of establishing rates to be paid by the state (1) to private facilities which provide functional, vocational services or residential services for severely handicapped persons pursuant to section 17b-244, and (2) to associations which provide day care and vocational training programs pursuant to section 17b-245, the state shall include reimbursement for reasonable costs, within available appropriations, mandated by collective bargaining agreements with certified collective bargaining agents or other agreements between any such facility or association and its employees.