The lawful use of any land or building existing
at the time of adoption of this chapter may be continued although
such use does not conform with the provisions of this chapter. Any
such building may be reconstructed or structurally altered and the
nonconforming use thereby changed, provided that the following conditions
prevail.
The nonconforming use of land shall not be enlarged
or extended beyond the area of land occupied by such use at the time
of the adoption of this chapter. A nonconforming use of land may not
be moved in whole or in part to any other portion of the lot or parcel
of land occupied by such nonconforming use at the time of adoption
of this chapter. A nonconforming use of land shall not be changed
to another nonconforming use. If a nonconforming use of land is discontinued
for a period of 12 consecutive months, it shall not be renewed, and
any subsequent use of the land shall conform to the regulations of
the district in which the land is located.