(a) As used in this Code section, the term "state authority" means:

(1) The Georgia Building Authority (Hospital) provided for in Article 2 of Chapter 7 of Title 31;

(2) The Jekyll Island--State Park Authority provided for in Part 1 of Article 7 of Chapter 3 of Title 12; or

(3) The Stone Mountain Memorial Association provided for in Part 4 of Article 6 of Chapter 3 of Title 12.

(b) The provisions of any other laws of this state to the contrary notwithstanding, no state authority shall be authorized to sell real property; provided, however, this prohibition shall not apply to the sale or other disposition of real property by a state authority when such real property is necessary for a public road right of way.