651. Where a supply of property or a service, other than a subscription to a magazine, is made and consideration for the supply of the property or service delivered, performed or made available during any period beginning before 1 July 1992 and ending after 30 June 1992 is paid by the recipient under a budget payment arrangement with a reconciliation of the payments to take place at or after the end of the period and before 1 July 1993, at the time the supplier issues an invoice for the reconciliation of the payments, the supplier shall determine the positive or negative amount determined by the formula
A − B.
For the purposes of this formula,(1) A is the tax that would be payable by the recipient for the part of the property or service supplied during the period that is delivered, performed or made available, as the case may be, after 30 June 1992, if consideration therefor had become due and been paid after 30 June 1992; and
(2) B is the total tax payable by the recipient in respect of the supply of the property or service delivered, performed or made available, as the case may be, during the period.