A. Subsection 1008.3.4, Duration, is hereby amended to read as follows:

1008.3.4 Duration

The emergency power system shall provide power for a duration of not less than 90 minutes, or such time as stipulated by Section 2702 when applicable for high-rise or underground buildings, and shall consist of storage batteries, unit equipment or an onsite generator. The installation of the emergency power system shall be in accordance with Section 2702 of the IBC.

B. Subsection 1011.12.2, Roof Access, is hereby amended to read as follows:

1011.12.2 Roof Access

Where a stairway is provided to a roof, access to the roof shall be provided through a penthouse complying with Section 1510.2 of the IBC.

EXCEPTION:

In buildings without an occupied roof, access to the roof shall be permitted to be a roof hatch or trap door not less than 16 ft² in area and having a minimum dimension of 3 ft.