(a)

(1) Part 1 of this chapter regarding advertising structures, junkyards and trash dumping applies to the Tennessee parkway system. If a conflict exists between this part and part 1 of this chapter regarding advertising structures, junkyards and trash dumping, due to a road having been designated as being on both the scenic highway system pursuant to part 1 of this chapter and the parkway system pursuant to this part, then part 1 of this chapter shall prevail. It is the intent of the general assembly that nothing contained in this subdivision (a)(1) shall be construed as having any retroactive force or taking away any vested right or be applied to any contractual obligation.

(2) Subdivision (a)(1) shall not apply to those parts of the system lying within any comprehensively zoned area, unless otherwise provided by the zoning regulations and within one-half (½) mile of any section of the parkway system where it crosses an interstate highway system.

(3) The commissioner of transportation may authorize the construction of advertising structures described in § 54-17-109(1) no larger than five hundred square feet (500 sq. ft.) and the construction and maintenance of signs that do not exceed eight square feet (8 sq. ft.) in area for nonprofit service clubs, charitable associations or religious services in accordance with criteria contained in rules and regulations that the commissioner is authorized to promulgate.

(4) The commissioner may also authorize the construction of advertising structures of the size specified in subdivision (a)(3) for business establishments located within five (5) miles of a parkway route that provide services to persons traveling on that route. This subdivision (a)(4) shall apply only to that portion of Highway 79 located west and south of the Tennessee River that is in the Tennessee parkway system.

(b) All business establishments shall be entitled to erect and maintain two (2) directional signs of less than seventy-five square feet (75 sq. ft.) indicating the location of their business premises, with the spacing and zoning required by present laws.