My office issued a construction RFP without stating the period of performance (POP) nor did the RFP provide for a place for the contractors to propose a POP. We have received the proposals, and of course, no one provided a POP. I am trying to find guidance, case law, etc., to provide the CO as to what should be done. If the low offeror is asked for their POP, but not the other contractors, I think a protest could be lodged. What are some issues that could occur? Is there the possibility that if the government had stated the POP in the RFP, could prices have been different? Any help would be greatly appreciated.