Any amendment to Part 3, Zoning, hereafter adopted which would change the permitted uses in a particular district, would create a new district designation wherein only certain uses would be permitted, or would realign certain district boundaries, and, as a result, would cause a use conforming to the provisions of this Part 3 as originally adopted to become nonconforming under the provisions of such amendment, such use shall be then deemed a nonconforming use and shall be subject to all the provisions of this article.