CFR›Title 23›Chapter I›Part 635›Subpart F ContainsSections 635.601–635.606CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart F—Indefinite Delivery/Indefinite Quantity (ID/IQ) Contracting Sections 635.601 § 635.601 Purpose. 635.602 § 635.602 Definitions. 635.603 § 635.603 Applicability. 635.604 § 635.604 ID/IQ Requirements. 635.605 § 635.605 Approvals and authorizations. 635.606 § 635.606 ID/IQ procedures. Source85 FR 72932, Nov. 16, 2020, unless otherwise noted. Previous E Subpart E—Construction Manager/General Contractor (CM/GC) Contracting