If a weighbridge has a pit –

(a) the entrance to the pit must be covered and be at least 1 metre deep and 900mm wide; and

(b) the neck of the pit must be at least 900mm wide; and

(c) there must be a clearance of at least 150mm on each side of a lever in the neck of the pit; and

(d) there must be free access to every part of the underwork and –

(i) if free access is available from above to every part of the underwork, there must be a clearance of at least 150mm below all parts of the underwork; or

(ii) in any other case, there must be a clearance of at least 400mm below the lowest lever; and

(e) the pit must be free-draining or be provided with automatic mechanical drainage and be kept free from any accumulation of water, mud and debris.