If the government is getting ready to award a government work authorization (GWA), can the government direct a prime to use a particular subcontractor that manufactures equipment that meets/exceeds the government's requirements. For instance, if the prime has been using a particular subcontractor for years, but this subcontractor has a history of increased costs for obsolescence and redesign, can the government direct the prime to choose another subcontractor with a larger business base in which obsolescence costs are dramatically decreased? Please let me know if you can point me to the FAR/DFAR for help in answering this question.