7. What are the work conditions? Working Holiday makers are permitted to do any kind of work of a temporary or casual nature. However, if you intend to work in your occupation in Australia, you should be aware that registration or licensing may be required.
Work condition 8108, which is attached to the Working Holiday visa, states that "the holder must not be employed in Australia by any one employer for more than 3 months,
without the prior permission in writing of the Secretary (of the Department)". The main purpose of your visit should be to holiday and travel. Any work should be incidental to supplement funds; periods of work should be broken up by periods of holiday and travel. Working beyond the three months with the same employer
without the required permission may result in your visa being cancelled and you may be required to leave Australia.
For the purposes of condition 8108, DIMIA regards the 'employer' as the organisation for which you are actually working, that is the organisation where the work is actually done, or the 'end user'. Where you are referred by an agency or labour supplier to a business, you are permitted to work for that business for three months. The same agency or labour supplier can later refer you to another business where you may work for another three months.
You are not permitted to extend your employment beyond 3 months with any one employer through the use of business affiliates and/or sub-contracting arrangements, or by using different employment agencies (to remain in the same job).
In practical terms, this means that you cannot work for longer than 3 months in the same position, in the same location, doing the same work.
Source:
http://www.immi.gov.au/faq/visiting/visiting03.htm#x7
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