2 C.F.R. § 180.935

Disqualified means that a person is prohibited from participating in specified Federal procurement or nonprocurement transactions as required under a statute, Executive order (other than Executive Orders 12549 and 12689), or other authority. Examples of disqualifications include persons prohibited under—

(a) The Davis-Bacon Act (40 U.S.C. 3142);

(b) The equal employment opportunity acts and Executive orders; or

(c) The Clean Air Act (42 U.S.C. 7606), Clean Water Act (33 U.S.C. 1368), and Executive Order 11738 (38 FR 25161).