The lawful use of land, buildings or structures existing when
this chapter was adopted may be continued on the lot or in the structure
although it may not conform to this chapter, and any such structure
may be restored or repaired in the event of partial destruction thereof;
provided, however, that none shall be enlarged, extended, relocated,
converted to another use or altered, except in conformity with this
chapter and as permitted below. Land on which a nonconforming use
or structure is located, and any nonconforming lot, shall not be subdivided
or resubdivided so as to be made more nonconforming in any manner.