The nature of a preexisting nonconforming use is determined from the actual use to which the property is put, rather than from the identity of the users. A modification of a preexisting nonconforming use to a new or changed use is prohibited subject to the following:
A. A proposed use need not be identical to the current use; it need only be sufficiently similar to the preexisting nonconforming use so as not to constitute a new or different use;
B. A change in technology is a continuation of a use;
C. A change in the intensity of a use is a continuation of a use; and
D. A change in use necessitated for compliance with a state or federal law is not an expansion.