(2) Violation of subsection (1) of this section with respect to a loan agreement or promissory note shall render any prepayment privilege penalty provision in the agreement void.
(3) "Loan agreement" as used in this section means a written document issued in connection with a particular loan which sets forth the terms upon which the loan will be made. "Loan agreement" does not include a mortgage or trust deed which secures a promissory note. Nothing in this section shall be deemed to require a lender to issue a loan agreement.
(4) This section does not apply to any loan agreement executed on or before September 13, 1967, or any loan not primarily for personal, family or household use. [1967 c.336 §§1,2; 1987 c.716 §3]