48 C.F.R. § 1601.104-2
(a) General. The FEHBAR conforms with the arrangement and numbering system prescribed by FAR 1.104. However, when a FAR part or subpart is adequate for use without further OPM implementation or supplementation, there will be no corresponding FEHBAR part, subpart, etc. The FEHBAR is to be used in conjunction with the FAR and the order for use is:
(b) Citation.