Hong Kong Regulations

FACTORIES AND INDUSTRIAL UNDERTAKINGS (GUARDING AND OPERATION OF MACHINERY) REGULATIONS - REGULATION 9

Push button controls to have emergency stopping devices

Machinery or plant driven by 2 or more motors with separate push button
controls shall be equipped with one or more overriding stopping devices by
means of which the machinery or plant can be stopped forthwith and, where
there is more than one stopping device, such devices shall be so spaced as to
enable their effective and convenient operation.