US lawFederal (United States)RegulationsTitle 48 CFR — Federal Acquisition Regulations SystemChapter 18 — NATIONAL AERONAUTICS AND SPACE ADMINISTRATIONPart 1815 — CONTRACTING BY NEGOTIATIONSubpart 1815.6—Unsolicited Proposals1815.67048 C.F.R. § 1815.670Foreign proposals.Last amended: 2016Year: 2026Length: 27 wordsOfficial source Cite as 48 C.F.R. § 1815.670 (2026)Unsolicited proposals from foreign sources are subject to NPD 1360.2, Initiation and Development of International Cooperation in Space and Aeronautics Programs. [64 FR 36606, July 7, 1999]Previous48 C.F.R. § 1815.609-70