(a) The commission may not adopt a rule restricting advertising or competitive bidding by a person licensed under this chapter except to prohibit a false, misleading, or deceptive practice.
(b) In its rules to prohibit a false, misleading, or deceptive practice, the commission may not include a rule that:
(1) restricts the person's use of any advertising medium;
(2) restricts the person's personal appearance or the 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.