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� <br /> � . ` , • II <br /> (x) PM 305.6 by deleting the period after the word "condition" and inserting the words <br /> "and shall have intermediate rails, balusters, or other construction such that a sphere with a <br /> diameter of 6" cannot pass through any opening." <br /> (y) PM 405.2 by deleting the Exception noted in this Subsection. <br /> (z) Add a subsection PM 405.5.1 as follows: PM 405.5.1 - Dwelling Units: Every <br /> dwelling unit shall contain a minimum gross floor area of not less than 150 square feet for the first <br /> occupant, and 100 sq. ft. for each additional occupant. The floor area shall be calculated on the <br /> basis of the total area of all habitable rooms. <br /> (aa) PM 405.6 by inserting after the first sentence thereof the words "An efficiency <br /> apartment may be allowed if the total area equals that required for the total of a living room, <br /> dining room, kitchen, and bedroom as set forth in Table PM 405.5, if the total square footage is <br /> equal to or greater than that required in PM 405.3 and the ventilation is equal to or greater than <br /> the total required in PM 404.1." <br /> (bb) Add a subsection PM 405.11 as follows: Below Grade Rooms: Rooms partially or <br /> completely below grade shall not be used as habitable space unless: <br /> 1. Floors and walls are water-tight so as to prevent entry of moisture. <br /> 2. All habitable rooms shall be provided with aggregate glazing of not less than 8 percent <br /> of the floor area of such rooms. <br /> , 3. Where windows are provided as a means of egress or rescue, the windows shall have <br /> the bottom of the clear opening not more than 44 inches above the floor. <br /> 4. The minimum net clear opening for below-grade room windows to be used for egress <br /> or rescue shall be 5 square feet. <br />