This Subpart applies to every individual who operates a crane, as herein defined, operating in construction, demolition or excavation work. The commissioner finds that the trade or occupation of operating cranes, as herein defined, in construction, demolition and excavation work involves such elements of danger to the lives, health and safety of persons employed in such trade or occupation as to require special regulations for their protection and for the protection of other employees and the public in that such cranes may fall over, collapse, contact electric power lines, dislodge material and cause such material to fall or fail to support intended loads and convey them safely, unless such cranes are operated by individuals of proper ability, judgment and diligence.