As prescribed in 13.302-5(b), insert the following clause:
Invoices (Apr 1984)
The Contractor’s invoices must be submitted before payment can be made. The Contractor will be paid on the basis of the invoice, which must state-
(a) The starting and ending dates of the subscription delivery; and
(b) Either that orders have been placed in effect for the addressees required, or that the orders will be placed in effect upon receipt of payment.
(End of clause)