48 CFR § 915.605
Content of unsolicited proposals
November 17, 2020
(b)
(5) Unsolicited proposals for nonnuclear energy demonstration activities not covered by existing formal competitive solicitations or program opportunity notices may include a request for federal assistance or participation, and shall be subject to the cost sharing provisions of subpart 917.70.
[63 FR 56851, Oct. 23, 1998, as amended at 74 FR 36364, July 22, 2009]