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1011.1.1.1 Change of Occupancy Classification Without Separation
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Where a portion of an existing building is changed to a new occupancy classification or where there is a change of occupancy within a space where there is a different fire protection system threshold requirement in Chapter 9 of the International Building Code, and that portion is not separated from the remainder of the building with fire barriers having a fire-resistance rating as required in the International Building Code for the separate occupancy, the entire building shall comply with all of the requirements of Chapter 9 of this code applied throughout the building for the most restrictive occupancy classification in the building and with the requirements of this chapter.
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Existing Building Code 2018 of Illinois > 10 Change of Occupancy > 1011 Change of Occupancy Classification > 1011.1 General > 1011.1.1 Compliance With Chapter 9 > 1011.1.1.2 Change of Occupancy Classification With Separation