(a) The board may not adopt rules restricting advertising or competitive bidding by a person regulated by the board except to prohibit false, misleading, or deceptive practices by the person.
(b) The board may not include in rules to prohibit false, misleading, or deceptive practices a rule that:
(1) restricts the person's use of any medium for advertising;
(2) restricts the person's personal appearance or use of the person's voice in an advertisement;
(3) relates to the size or duration of an advertisement by the person; or
(4) restricts the person's advertisement under a trade name.