(a) The lawful use of land existing on August 8, 1978, or on the effective date of any pertinent amendment to this chapter, although such use does not conform to the provisions hereof, may be continued; but, if such nonconforming use be discontinued, any future use of such land shall be in conformity with the provisions of this chapter.
(b) The lawful use of a building, existing as of August 8, 1978, or on the effective date of any pertinent amendment to this chapter, although such use does not conform to the provisions hereof, may be continued and such use may be extended throughout the building; provided, that no structural alterations may be made other than those ordered by the Mayor to assure the safety of the building; and provided further, that such extension does not displace any residence use in a residence district established by this chapter.
(c) A nonconforming use of a building may be changed to another nonconforming use of the same or of a more restrictive classification; provided, that no structural alterations be made other than those ordered by the Mayor to assure the safety of the building; and provided further, that such extension does not displace any residence use in a residence district established by this chapter.
(d) Whenever a nonconforming use of a building has been changed to a more restricted use or to a conforming use, such use shall not thereafter be changed to a less restricted use.
(e) Whenever a nonconforming use of a building or portion thereof has been discontinued for a period of at least one year, such nonconforming use shall not thereafter be reestablished, and the future use shall be in conformity with the provisions of this chapter.
(Passed 6-17-57; 8-8-78.)