(a) Except as provided by Subsection (b), a Type A corporation may spend not more than 10 percent of the corporate revenues for promotional purposes.
(b) A Type A corporation may spend not more than 25 percent of the corporate revenues for promotional purposes if the authorizing municipality:
(1) is located in two counties;
(2) has a population of less than 24,250 according to the 1990 federal census; and
(3) is located wholly or partly within 10 miles of a federal military reservation.