CFR›Title 48›Chapter 25›Part 2509 ContainsSubpart 2509.4CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 PART 2509—CONTRACTOR QUALIFICATIONS Subparts 2509.4 Subpart 2509.4—Debarment, Suspension, and Ineligibility Sections 2509.400–2509.410 AuthoritySec. 11(a), National Science Foundation Act of 1950, as amended (42 U.S.C. 1870(a)).Source57 FR 34881, Aug. 7, 1992, unless otherwise noted. Previous 2501 Part 2501—Federal Acquisition Regulations System Next 2515 Part 2515—Contracting by Negotiation