An individual who is at least 18 years of age and who has the permission of the owner or lessee of a crane to take instruction in its operation and is operating such crane under the direct supervision of a certified crane operator or public operator.

An individual who holds a valid certificate of competence to operate a crane issued by the commissioner.

Shall mean any tower crane or mobile crane.

An individual who is at least 21 years of age and is employed only to test or repair a crane and is operating it for such purpose while under the direct supervision of a certified crane operator or public operator.

A mobile, carrier-mounted, power-operated hoisting machine utilizing hoisting rope and a power-operated boom which moves laterally by rotation of the machine on the carrier having a manufacturers' maximum rated capacity exceeding five tons or a boom exceeding 40 feet in length.

An individual who is at least 21 years of age and is employed by the Federal government, the State or a political subdivision, agency or authority of the State and is operating a crane owned or leased by the Federal government, the State or such political subdivision, agency or authority and his assigned duties include operation of a crane.

Any lifting structure that uses a vertical mast or tower to support a working boom or jib in an elevated position having a base that is either fixed or ballasted and moveable between locations.