(a)
(1) Banks shall have the power to make rules governing deposits, including provisions for reasonable notice, not to exceed ninety (90) days, for the withdrawal of deposits and for changes in or amendments to those rules to be made by the bank without approval of the depositor.
(2) Notice of the rules and all changes therein shall be given to each customer whose deposits are affected by the rules, either by delivery or mailing of a copy to the customer or by posting them in a conspicuous area in the main office and in all branch offices of the bank.
(3) If the rules are stated on a signature card or other document signed by the customer, the bank shall be deemed to have given notice of the rules for purposes of this provision even if the signature card or document is returned to the bank.
(b) Rules so made shall be a valid contract between the depositor and the bank, subject to the right of the bank to change or amend the rules in the manner provided in the rules.