1.Benefits in kind provided in accordance with the provisions of this chapter by the institution of one Member State on behalf of the institution of another Member State shall be fully refunded.
2.The refunds referred to in paragraph 1 shall be determined and made inaccordan ce with the procedure provided for by the implementing Regulation referred to in Article 98, either on production of proof of actual expenditure or on the basis of lump-sum payments.
In the latter case, the lump-sum payments shall be such as to ensure that the refund is as close as possible to actual expenditure.
3.Two or more Member States, or the competent authorities of those States, may provide for other methods of reimbursement or may waive all reimbursement between institutions under their jurisdiction.