The provisions of this chapter shall be used in conjunction with Chapters 5 through 12 and shall apply to the alteration, repair, addition and change of occupancy of existing structures, including historic and moved structures, as referenced in Section 101.5.2. The work performed on an existing building shall be classified in accordance with this chapter.
Level 1 alterations include the removal and replacement or the covering of existing materials, elements, equipment, or fixtures using new materials, elements, equipment, or fixtures that serve the same purpose.
Level 3 alterations apply where the work area exceeds 50 percent of the aggregate area of the building and where required by a change of occupancy classification in accordance with section 912.1.1.
Relocated buildings provisions shall apply to relocated or moved buildings.