This notice concerns a commercial off-the-shelf item that requires Government source approval prior to contract award due to its flight-critical nature. Only previously approved sources have been solicited, and new sources must submit the required Source Approval Information Brochure with their proposal. The time required for new source approval is normally too long to allow for award delay. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, though this notice is not a request for competitive proposals. Interested parties may submit capability statements for consideration in determining whether to conduct a competitive procurement.