Well, the answer to your question is - all of them.
1(a) Authority and scope.
1. Scope. The Equal Credit Opportunity Act and Regulation B apply to all credit—commercial as well as personal—without regard to the nature or type of the credit or the creditor, except for an entity excluded from coverage of this part (but not the Act) by section 1029 of the Consumer Financial Protection Act of 2010 (12 U.S.C. 5519). If a transaction provides for the deferral of the payment of a debt, it is credit covered by Regulation B even though it may not be a credit transaction covered by Regulation Z (Truth in Lending) (12 CFR Part 1026). Further, the definition of creditor is not restricted to the party or person to whom the obligation is initially payable, as is the case under Regulation Z. Moreover, the Act and regulation apply to all methods of credit evaluation, whether performed judgmentally or by use of a credit scoring system.