12 C.F.R. § 1002.9
(a) Notification of action taken, ECOA notice, and statement of specific reasons - (1) When notification is required. A creditor shall notify an applicant of action taken within:
(2) Content of notification when adverse action is taken. A notification given to an applicant when adverse action is taken shall be in writing and shall contain a statement of the action taken; the name and address of the creditor; a statement of the provisions of section 701(a) of the Act; the name and address of the Federal agency that administers compliance with respect to the creditor; and either:
(3) Notification to business credit applicants. For business credit, a creditor shall comply with the notification requirements of this section in the following manner:
(i) With regard to a business that had gross revenues of $1 million or less in its preceding fiscal year (other than an extension of trade credit, credit incident to a factoring agreement, or other similar types of business credit), a creditor shall comply with paragraphs (a)(1) and (2) of this section, except that:
(ii) With regard to a business that had gross revenues in excess of $1 million in its preceding fiscal year or an extension of trade credit, credit incident to a factoring agreement, or other similar types of business credit, a creditor shall: