Actually, it can be exempt from Z , but not from RESPA...This is a prime example of one exempt and the other technically not exempt.
Reg X only recognizes part 1 of Z's exemption.
(b) Exemptions. (1) [Reserved]
(2) Business purpose loans. An extension of credit primarily for a business, commercial, or agricultural purpose,
as defined by 12 CFR 1026.3(a)(1) of Regulation Z. Persons may rely on Regulation Z in determining whether the exemption applies.