The RFP’s definition of “what” will and must happen during the response period, “when” it must happen, and (in some cases) “how.”
Obligates both client and bidder, but the bidder more so, since the client defines and can change the rules (for example, the client can unilaterally reschedule the final date for receiving questions, but bidders cannot submit their proposal after the announced submission date).
May include requirements for bidder participation in meetings (public and/or private), attendance at site visits, and submission of preliminary designs, reports, and plans.