Legislative and regulatory requirements for slewing mobile crane operation
High risk work licensing sits inside a layered framework you must be able to name and apply. At the top is general work health and safety law imposing a primary duty on the person conducting a business or undertaking to eliminate or minimise risk so far as reasonably practicable. Beneath that sit the regulations and model codes of practice dealing with plant, high risk work, licensing, registrable plant and general risk management. The licence class C1 authorises operation of a slewing mobile crane with a rated capacity up to 100 tonnes, and the licence must be carried or available for inspection while you work.
Know the difference between duties that are absolute and duties qualified by "reasonably practicable". Questions love to blur these. Also understand the chain of responsibility: designer, manufacturer, importer, supplier, owner, competent person and operator each carry separate obligations. Registration, maintenance records, inspection intervals and logbook entries are legal requirements, not optional housekeeping.
Trap: assuming a licence permits any crane. The class, the capacity and any conditions on the licence all matter. Another trap is confusing a code of practice (admissible as evidence of what is reasonably practicable) with the regulation itself (legally binding).
Rule of thumb: if you cannot point to the duty holder, the legal instrument and the control, your answer is incomplete. Worked example: asked who must ensure a crane is inspected before use, the correct reasoning is that the PCBU must ensure inspection by a competent person, and the operator must not use plant that is unsafe or has not been inspected as required.