A mediator can be appointed by either party at any stage, and you don't need to be in default to do so. Notice must be given in writing by the party instigating the mediation.
To find out more information on the process and to find a mediator, contact the relevant state body:
New South Wales Rural Assistance Authority (RRA)
Website: RRA website
Phone: 1300 228 228
Email: rural.assist@rra.nsw.gov.au
Queensland Rural and Industry Development Authority (QRIDA)
Website: QRIDA website
Phone: 1800 623 946