First you need to decide whether your business requires an electrical contractor's licence.

Electrical Safety Act states:

56 Requirement for electrical contractor licence
(1) A person must not conduct a business or undertaking that includes the performance of electrical work unless the person is the holder of an electrical contractor licence that is in force.
Maximum penalty—400 penalty units.
(2) Without limiting subsection (1), a person conducts a business or undertaking that includes the performance of electrical work if the person—

(a) advertises, notifies or states that, or advertises, notifies or makes a statement to the effect that, the person carries on the business of performing electrical work; or
(b) contracts for the performance electrical work, other than under a contract of employment; or
(c) represents to the public that the person is willing to perform electrical work; or
(d) employs a worker to perform electrical work, other than for the person.
(3) However, a person does not conduct a business or undertaking that includes the performance of electrical work only because the person—
(a) is a licensed electrical mechanic who—
(i) performs electrical work for the person or a relative of the person at premises owned or occupied by the person or relative; or
(ii) makes minor emergency repairs to make electrical equipment electrically safe; or
(b) contracts for the performance of building work that includes the performance of electrical work if the electrical work is intended to be subcontracted to the holder of an electrical contractor licence who is authorised under the licence to perform the work.
(4) This section does not authorise the performance of electrical work by a person who does not have an electrical work licence for the work.
(5) A person does not contravene subsection (1) if—
(a) the person conducts a business or undertaking that includes the performance of electrical work as a partner in a partnership; and
(b) the partnership is the holder of an electrical contractor licence that is in force.


So - what does all this mean? Briefly speaking - if your business includes electrical work which you contract to others, and the electrical work is performed outside a workplace registered by WPHS (refer to electrical work), then your business needs an electrical contractor's licence. If the area is grey, most companies I have worked with err on the side of caution and gain an electrical contractor's licence anyway. However, in the end, it is you, the employer, that must decide whether you require an electrical contractor's licence. The Electrical Safety Office must be very cautious in offering advice (as do I), where legislation is involved. Basically only a Judge can interpret legislation and make decisions on these matters.

You may not require an electrical contractor's licence if you have a Trade Contractor's Licence:

Electrical Safety Regulation states:

55A Operation of trade contractor’s licence
(1) For the conduct of a business or undertaking that includes the performance of electrical work, a person is taken to be the holder of an
electrical contractor licence to the extent that performance of the electrical work is a necessary part of, or is incidental to, the performance of work
under a trade contractor’s licence.
(2) In this section—
“electrical work” does not include electrical installation work.
“trade contractor’s licence” means a trade contractor’s licence under the Queensland Building Services Authority Regulation 1992.

So - if your a plumber or a refrigeration mechanic, it is likely that you already have a Trade Contractor's licence and therefore do not require an Electrical Contractor licence.