A. Notwithstanding the provisions of R.S. 31:1-1 or any other law to the contrary, the rate or rates on advance loans shall be as agreed to by the bank and the borrower. Interest may be reckoned according to any method authorized by R.S. 31:1-1. The contract may provide that the interest rate may be increased, or may be decreased, or both, from time to time; provided, however, that no increase in interest shall be effective unless:
(a) at least 90 days prior to the effective date of the first such increase, or 30 days prior to the effective date of any subsequent increase, a written notice has been mailed or delivered to the borrower that clearly and conspicuously describes such change and the indebtedness to which it applies and states that the incurrence by the borrower or another person authorized by him of any further indebtedness under the plan to which the agreement relates on or after the effective date of the increase specified in the notice shall constitute acceptance of the increase and (b) either the borrower agrees in writing to the increase or the borrower or another person authorized by him incurs such further indebtedness on or after the effective date of the increase stated in the notice. The provisions of this paragraph permitting an increase in a rate of interest shall not apply in the case of an agreement which expressly prohibits changing of interest rates or which provides limitations on changing of interest rates which are more restrictive than the requirements of this paragraph. If the contract provides for the possibility of an increase or decrease, or both, in the rate, that fact shall be clearly described in plain language, in at least 8-point boldface type on the face of the contract.