The provisions of this Code became effective April 20, 2002 and were originally adopted on March 14, 2002. Development plans approved under previous regulations that received vested property rights through a site specific development plan shall be valid for the duration of that vested property right, provided that all terms and conditions of the site specific development plan are followed. Existing legal uses that may become nonconforming by adoption of this Code shall become legal nonconforming uses subject to the provisions of Section 3.6.