Section 102.1 is amended to read as follows:

102.1 Construction and design provisions. The construction and design provisions of this code shall apply to:

1. Structures, facilities and conditions arising after the adoption of this code.

2. Existing structures, facilities, and conditions not legally in existence at the time of adoption of this code.

3. Existing structures, facilities and conditions when identified in specific sections of this code.

4. Existing structures, facilities, and conditions, which, in the opinion of the fire code official, constitute a distinct hazard to life and property.

5. Existing structures, alterations and repairs.

5.a. All new work performed in alterations and/or repairs to existing structures shall comply with the current provisions of this chapter.

5.b. When alterations and/or repairs result in the removal, alteration, modification, replacement and/or repair of fifty percent (50%) or more of the external walls of a building, or result in the removal, modification, replacement and/or repair of fifty percent (50%) or more of the existing internal structural and/or non-structural framework, independently or in combination thereof, within a five year period, the entire building shall be made to conform to the current provisions of this chapter

5.c. Calculations of linear wall measurements shall be shown on all plans submitted for building permits, on the cover page in the project description of said plans.

5.d. The determination under this section of the requirement for upgrading any existing structure to full conformance with the current provisions of this chapter shall be at the sole discretion of the fire code official.