The lawful use of land and advertising signs and bulletin boards which do not conform to the provisions of this Chapter shall be discontinued within one (1) year from April 24, 1963, and the use of land and signs and bulletin boards which become non-conforming by reason of a subsequent change in this Chapter shall also be discontinued within one (1) year from the date of the change.

The lawful use of a building existing on or before April 24, 1963, may be continued, although such use does not conform to the provisions of this Chapter. If no structural alterations are made, a non-conforming use of a building may be changed to another non-conforming use of the same or of a more restricted classification. Whenever a non-conforming use 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.

Whenever the use of a building becomes non-conforming through a change in the zoning regulations or district boundaries, such use may be continued and if no structural alterations are made, it may be changed to another non-conforming use of the same or of a more restricted classification.

In the event that a non-conforming use of any building or premises is discontinued for a period of one (1) year, the use of the same shall thereafter conform to the use regulations of the district in which it is located.

No existing building or premises devoted to a use not permitted by this Chapter in the district in which such building or premises is located, except when required to do so by law or order, shall be enlarged, extended, reconstructed or structurally altered, unless such use is changed to a use permitted in the district in which such building or premises is located.

When a building, the use of which does not conform to the provisions of this Chapter, is damaged by fire, explosion, act of God or the public enemy or other causes, to the extent of more than fifty percent (50%) of its true value, it shall not be restored or used except in conformity with the district regulations and use regulations of the district in which the building is situated. When a building, the use of which does not conform to the provisions of this Chapter, is damaged by fire, explosion, act of God or the public enemy or other causes, to the extent of less than fifty percent (50%) of its true value, it may be restored if the Board of Adjustment finds some compelling public necessity requiring the continuance of the non-conforming use and the primary purpose of continuing the non-conforming use is not to continue a monopoly. True value shall be determined by using assessed value as the basis of value, taking into account the ratio of assessed value to true value, being used by the County Assessor's office at such time.

When a building located in an "R-1" or "R-2" Single-Family Dwelling District and used as a single-family dwelling shall have been constructed in conformance with the provisions of the Zoning Code at the time such building was erected, and if the Zoning Code was subsequently amended by changing the setback requirements for the front yard, side yard and/or rear yard so as to make such building a non-conforming building, and such building is damaged by fire, explosion, act of God or the public enemy or other causes to any extent, including one hundred percent (100%) of its true value, it may be restored on the same location and/or foundation as it had occupied previous to such damage or destruction.