When, within the various districts established by this chapter, or amendments that may be later adopted, there exist lots, structures, or uses that were in conformity with the applicable zoning ordinance and regulations when created but which would be prohibited or do not conform to the requirements of this chapter or future amendment, it is the intent of this chapter to:
(1)
Allow these nonconforming uses to continue until they are removed; be enlarged upon, expanded, or extended;
(2)
Not encourage their survival or perpetuation;
(3)
Insure that the nonconformities shall not be enlarged upon, expanded, or extended;
(4)
Not permit the nonconformities to be used as grounds for adding other structures or uses prohibited elsewhere in the same district;
(5)
Not permit the attachment of additional signs to the building or the placement of additional signs or display devices on the land outside the building or permit the addition of other uses if such additions are of a nature that would be prohibited generally in the district involved.