48 CFR § 1413.306 - Standard Form 44, Purchase order-invoice-voucher.

HCAs are responsible for establishing bureau procedures to control the use of the SF 44 and accounting for all purchases made using the form. Bureau procedures shall include instructions covering:

(a) Maintenance of a list of designated individuals authorized to make purchases using the form;

(b) Controls for issuing the form to authorized individuals; and

(c) Review of purchase transactions using the form to assure compliance with authorized procedures.