Where spraying is done into any cabinet or enclosure as contemplated in subregulation (2), the employer concerned shall cause the ventilation system contemplated in subregulation (3) to comply with the following
requirements:
(a) Where the area of the open face of the cabinet is not more than one square metre, the average speed of air movement through the said face shall not be less than one metre per second;
(b) where the area of the open face is more than one square metre but less than two square metres, the average speed of air movement through the said face shall not be less than 0,75 metres per second; or
(c) where the area of the open face is equal to or exceeds two square metres, the average speed of air movement through the said face shall not be less than 0,5 metres per second.