(a) The NFS is amended by publishing changes in the Federal Register. These changes are then incorporated into the NASA-maintained Internet version of the NFS through
Procurement Notices (PNs). PNs are numbered consecutively, prefixed by the last two digits of the calendar year of issuance of the current edition of the NFS.
(b) Compliance with a revision to the NFS shall be in accordance with the PN containing the revision. Unless otherwise stated, solicitations that have been issued, and bilateral agreements for which negotiations have been completed, before the receipt of new or revised contract clauses need not be amended to include the new or revised clauses if including them would unduly delay the acquisition.
