Any party jurisdiction rendering aid in another party jurisdiction pursuant to this compact must, if requested, be reimbursed by the party jurisdiction receiving such aid for any loss or damage to or expense incurred in the operation of any equipment and the provision of any service in answering a request for aid and for the costs incurred in connection with those requests. An aiding party jurisdiction may assume in whole or in part any such loss, damage, expense or other cost or may loan such equipment or donate such services to the receiving party jurisdiction without charge or cost. Any 2 or more party jurisdictions may enter into supplementary agreements establishing a different allocation of costs among those party jurisdictions. Expenses under section 942 are not reimbursable under this section. [PL 1999, c. 696, §1 (NEW).]