48 C.F.R. § 1601.301 – Policy.

(a) Procedures, contract clauses, and other aspects of the acquisition process for contracts in the FEHBP shall be consistent with the principles of the FAR. Changes to the FAR that are otherwise authorized by statute or applicable regulation, dictated by the practical realities associated with the unique nature of health care procurements, or necessary to satisfy specific needs of the Office of Personnel Management shall be implemented as amendments to the FEHBAR and published in the Federal Register, or as deviations to the FAR in accordance with FAR subpart 1.4.
(b) Internal procedures, instructions, and guides that are necessary to clarify or implement the FEHBAR within OPM may be issued by agency officials specifically designated by the Director, OPM. Normally, such designations will be specified in the OPM Administrative Manual, which is routinely available to agency employees and will be made available to interested outside parties upon request. Clarifying or implementing procedures, instructions, and guides issued pursuant to this section of the FEHBAR must—
1. (1) Be consistent with the policies and procedures contained in this regulation as implemented and supplemented from time to time; and
2. (2) Follow the format, arrangement, and numbering system of this regulation to the extent practicable.