(a) to a partnership, corporation or unincorporated association; or

(b) to a natural person for purposes other than personal, family or household use;

provided that any loan that would otherwise qualify as a commercial, corporate or business loan but for the fact that such loan also qualifies as an investment under section 235(31) or 379(7) of the Banking Law may, at the election of the savings bank or savings and loan association, be treated as a commercial, corporate or business loan for purposes of this Part. In determining whether a loan to a natural person is a commercial loan, a savings bank or savings and loan association may rely on the borrower's statement of purpose if accepted in good faith.