This is a sole-source procurement for a flight-critical part requiring Government source approval prior to award, with only previously approved sources being solicited. The Government intends to negotiate with only one source, but all responsible sources may submit a proposal or statement of capability within 45 days of the synopsis publication. Interested parties who are not approved sources must submit specific source approval information with their proposal, as detailed in the NAVSUP WSS brochures. The notice clarifies that the Government is not using commercial item acquisition policies for this requirement. No specific budget, performance location, or non-bid/procurement timelines are detailed in this description.