I don't believe the Reg Z requirements apply to HELOCS.
1026.36(b) - This section does not apply to a home equity line of credit subject to § 1026.40, except that paragraphs (h) and (i) of this section apply to such credit when secured by the consumer's principal dwelling and paragraph (c)(3) applies to such credit when secured by a dwelling.
(NMLS requirements are paragraph (g))
Just SAFE Act (before acting as MLO, first communication, upon request)