48 CFR § 8.604 - Waivers.
FPI may grant a waiver for purchase of supplies in the FPI Schedule from another source. FPI waivers ordinarily are of the following types:
(a) General or blanket waivers issued when classes of supplies are not available from FPI.
(b) Formal waivers issued in response to requests from offices desiring to acquire, from other sources, supplies listed in the FPI Schedule and not covered by a general waiver. Agencies shall process waiver requests in accordance with the procedures at http://www.unicor.gov.