An employer shall ensure that -
(a) where an inadvertent seizure of the drive unit between a mobile item of work equipment and its accessories or anything towed creates a specific risk, the work equipment is equipped or adapted to prevent blockages of the drive units and where such seizure cannot be avoided, every possible measure is taken to avoid any adverse effects on employees, and
(b) where drive shafts for the transmission of energy between mobile items of work equipment can become soiled or damaged by trailing on the ground, facilities are available for fixing them.