The directive stipulates that:

Particular attention must be given to the following points:

• the machinery must not start unexpectedly
• the parameters of the machinery must not change in an uncontrolled way, where such change may lead to hazardous situations"

Parameter monitoring systems, such as low speed run, which through risk assessment are considered as a risk reduction measure must be implemented in accordance with appropriate devices and systems. Risk assessments must also identify normal or abnormal conditions which could lead to an unexpected start up and prevent such start up through the safety related control system.