All machinery must be fitted with one or more emergency stop devices which are clearly identifiable, accessible and sufficient in number to prevent hazardous situations which are likely to occur or which are in the process of occurring.
The following are excluded from this obligation:
1° Machinery for which an emergency stop device would not be able to reduce the risk, either because it would not reduce the time needed to come to a normal stop, or because it would not allow the specific measures required by the risk to be taken;
2° Portable and hand-guided machinery.