Nothing contained in Chapters 20.02 - 20.60 requires any change in the plans, construction or designated use of any building upon which actual construction was lawfully begun prior to the effective date an area is zoned or rezoned under Chapters 20.02 - 20.60. "Actual construction" means the actual placing of construction materials in their permanent position, fastened in a permanent manner or actual work in excavating a basement, provided that in all cases actual construction work shall be diligently carried on until the completion of the building or structure involved.
(Ord. 67-10 § 5.0206, 1967.)