48 C.F.R. § 13.000
This part prescribes policies and procedures for the acquisition of supplies and services, including construction, research and development, commercial products, and commercial services, the aggregate amount of which does not exceed the simplified acquisition threshold (see 2.101). Subpart 13.5 provides special authority for acquisitions of commercial products and commercial services exceeding the simplified acquisition threshold but not exceeding $7.5 million ($15 million for acquisitions as described in 13.500(c)), including options. See part 12 for policies applicable to the acquisition of commercial items exceeding the micro-purchase threshold. See 36.602-5 for simplified procedures to be used when acquiring architect-engineer services.
48 C.F.R. §13.000