11.4.2.3.

(1) Except as required in Sentence 11.4.2.5.(4), the performance level of an existing building is reduced where proposed construction will result in,

(a) the change of the major occupancy of all or part of an existing building to another major occupancy of a greater hazard index,

(b) the conversion of a suite of a Group C major occupancy into more than one suite of Group C major occupancy,

(c) a suite or part of a suite of a Group A, Division 2 or a Group A, Division 4 major occupancy is converted to a gaming premises,

(d) the change of a farm building or part of a farm building to a major occupancy,

(e) the change of a building or part of a building is to a post-disaster building, or

(f) the change in use of a building or part of a building where the previous major occupancy of the building or part of the building cannot be determined.

(2) For the purpose of this Article and Sentences 11.4.2.1.(1) and 11.4.2.5.(4), the change of use set out in Clauses (1)(b) to (e) shall also be deemed to constitute a change in major occupancy.

(3) The performance level of an existing building is reduced where the early warning and evacuation systems requirements of other Parts for the proposed major occupancy exceed those of the existing building.

(4) The performance level of an existing building is reduced where the proposed major occupancy in the building is not separated from the adjoining major occupancies by fire separations having fire-resistance ratings conforming to Tables 3.1.3.1. and 11.4.3.4.B.v1

(5) The performance level of an existing building is reduced where the occupancy of all or part of an existing building of combustible construction is changed to a new major occupancy that would require the building, if it were a new building, to be constructed of noncombustible construction.