As long as the Existing Smoke Shop remains in its current location, it shall be subject to the provisions of Article 21 of Chapter 2 of Title 9, "Nonconforming Uses" and subject to the provisions of this article. If the Existing Smoke Shop exercises its right to relocate, once, it shall continue to be subject to the provisions of Article 21 of Chapter 2 of Title 9, "Nonconforming Uses" throughout its establishment at its new location.