The regulations prescribed in this chapter shall not be construed to require the removal, lowering or other change or alteration of any structure or tree not conforming to such regulations as of December 17, 1962, or otherwise interfere with the continuance of any non-conforming use. Nothing in this chapter shall require any change in the construction, alteration or intended use of any structure, the construction or alteration of which was begun prior to December 17, 1962, and is diligently prosecuted and completed within a reasonable time thereof.
(1966 Code, § 3-8) (Ord. 231, § 7)