24 C.F.R. § 15.108
(d) Where notice is required. Notice will be given to a submitter wherever:
(f) Notice of intent to disclose. HUD will consider a submitter's objections and specific grounds for nondisclosure in deciding whether to disclose business information. Whenever HUD decides to disclose business information over the objection of a submitter, HUD will give the submitter written notice, which will include:
(g) Exceptions to notice requirements. The notice requirements of paragraphs (c) and (f) of this section will not apply if: