International Building Code Section 504.4.1 is hereby amended to read as follows:

504.4.1 Stair enclosure pressurization increase. For Group R-1, R-2, and I-1 Condition 2 assisted living facilities licensed under Chapter 388-78A WAC and residential treatment facilities as licensed by Washington State under Chapter 246-337 WAC located in buildings of Type VA construction equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1, the maximum number of stories permitted in Section 504.4 may be increased by one provided the interior exit stairways and ramps are pressurized in accordance with Sections 909.6.3 and 909.20. Legally required standby power shall be provided in accordance with Sections 909.11 and 2702.2.16 for buildings constructed in compliance with this section and be connected to stairway shaft pressurization equipment, elevators and lifts used for accessible means of egress (if provided), elevator hoistway pressurization equipment (if provided) and other life safety equipment as determined by the authority having jurisdiction. For the purposes of this section, legally required standby power shall comply with the 2020 Washington Cities Electrical Code (NFPA 70) Section 701.12, options (C), (D), (E), (F), (H), or (J) or subsequent revised section number(s).