A. Generally: This Code applies to all principal structures, their premises, and accessory structures thereto.
B. Existing Structures:
1. All structures must conform to this Chapter. A building need not be altered or changed to exceed the requirements of the Building Code in effect at the time of its construction, except in the following cases:
a. If the structure is altered or enlarged pursuant to the State Building Code;
b. If the structure is moved or relocated;
c. If the structure is determined to be unsafe or hazardous by the Housing Official pursuant to the State Building Code or State law; or
d. If a change in use has occurred.
2. Occupancy in structures lawfully existing under the Building Code may be continued under this Code.