48 CFR 15.601 : Federal Acquisition Regulations System (Section 1.000 To Parts 9906-9999) — Federal Acquisition Regulation (Parts 1 - 99) (Section 1.000 To Parts 54-99) — Contracting Methods And Contract Types (Parts 13 - 18) (Section 13.000 To Section 18.204) — Contracting By Negotiation (Section 15.000 To Section 15.609) — Unsolicited Proposals (Section 15.600 To Section 15.609) — Definitions.