(a) The commission may not adopt rules restricting competitive bidding or advertising by a credit union except to prohibit false, misleading, or deceptive practices.
(b) In its rules to prohibit false, misleading, or deceptive practices, the commission may not include a rule that:
(1) restricts the use of any medium for advertising;
(2) relates to the size or duration of an advertisement by the credit union; or
(3) restricts the credit union's advertisement under a trade name.