FAR 32.1108 and 32.1110(d) provide instructions for use of the appropriate clause when payment under a written contract is made by GPC. When using the GPC for contract payments, the contracting officer

will insert the FAR clause 52.232-36, Payment by Third Party, in solicitations and contracts. Payment by a purchase card may also be made under a contract that does not contain the clause at 52.232-36, to the extent the contractor agrees to accept that method of payment. When the clause at 52.232-36 is included in a solicitation or contract, the contracting officer will also insert the clause at 52.232-33, Payment by Electronic Funds Transfer—Central Contractor Registration, or 52.232-34, Payment by Electronic Funds Transfer—Other Than Central Contractor Registration, as appropriate. The contracting officer should also insert DFARS clause 252.232-7003, Electronic Submission of Payment Requests and Receiving Reports.