Safety guarding on machines and equipment prevent or reduce access to dangerous areas of the machine. All machine guarding must be of a solid construction and securely mounted to the plant, to resist impact or shock from operation. If you need to remove guarding for maintenance and cleaning, you must take steps to ensure (so far as is reasonably practicable) that the plant cannot be restarted until the guarding is replaced. If the plant contains moving parts and those parts may break, disintegrate or be ejected, the guard must (so far as is reasonably practicable) effectively contain the broken or ejected parts.
If you manage or control a plant you must make sure the guarding:
is a permanently fixed physical barrier or an interlocked physical barrier (if access to the danger area is required during operation, maintenance or cleaning), or
is a physical barrier that can only be altered or removed by the use of tools when it is not reasonably practical to use guarding as in 1, or
is presence sensing safeguarding system when it is not reasonably practical to use guarding referred to in 1 or 2.
You must also make sure that:
the guarding makes bypassing or disabling the guarding as difficult as reasonably practical
any pipe or other part of the plant that is subject to heat or cold is guarded or insulated if there is a risk of injury