In order to effect visual contact with areas outside a workplace, where employees work the majority of their shift
in a room of which the floor area is less than 100 square metres, the employer of such employees shaft cause
every such room to be provided with windows in such a way that -
(a) the total glazed area of such windows is not less than three fifths of the square root of the floor area of the
room, both areas measured in square metres;
(b) the window sills are not higher and the window heads are not lower than one and a half metres above the
floor level of the room; and
(c) such windows are glazed with transparent material.