Section 7(f) of HUD's Regulation X states:
"(f) Open-end lines of credit (home-equity plans) under Truth in Lending Act. In the case of a federally related mortgage loan involving an open-end line of credit (home-equity plan) covered under the Truth in Lending Act and Regulation Z, a lender or mortgage broker that provides the borrower with the disclosures required by 12 CFR 226.5b of Regulation Z at the time the borrower applies for such loan shall be deemed to satisfy the requirements of this section."
The early TIL disclosure requirement is in Section 19 of Regulation Z applicable to closed end loans.
As to the HMDA question, page 10 of the FFIEC publication A Guide to HMDA Reporting Getting it Right! found at http://www.ffiec.gov/hmda/pdf/guide.pdf states the following:
"Home equity credit lines for home purchase or improvement may be reported at the institution’s option. Report only the amount that is intended for home purchase or home improvement purposes. An institution that reports home equity credit line originations must also report any applications that do not result in an origination."