A. The lawful uses of land for storage purposes (where such use is not an adjunct of any structure) and for advertising signs and billboards which do not conform to the provisions of this title shall be discontinued within five (5) years from the effective date hereof, and the same uses of land which become nonconforming by reason of a subsequent change by amending this title shall also be discontinued within five (5) years from the date of the change.
B. The lawful use of a building or mobile home existing at the effective date hereof may be continued, subject to the provisions of this title, although such use does not conform with the provisions hereof. If no structural alterations are made, a nonconforming use may be changed to another nonconforming use of the same or more restricted classification. The foregoing provisions shall also apply to nonconforming uses in districts hereafter changed. Whenever a nonconforming use of a building has been changed to a more restricted use or to a conforming use, such use shall not hereafter be changed to a less restricted use. (1982 Code § 5-7-1)