34.005-4 Demonstration contracts.
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
Whenever practicable, contracts for the demonstration phase should provide for contractors to submit, by the end of the phase, priced proposals, totally funded by the Government, for full-scale development. The contracting officer should provide contractors with operational test conditions, performance criteria, life cycle cost factors, and any other selection criteria necessary for the contractors to prepare their proposals.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.