It determines frequency allocations and licence conditions for all transmitting stations in Australia and its territories. Amateur Self-Regulation Amateurs use a wide variety of different modes. The best way of avoiding clashes is to set aside different band segments for each of these activities, so that all amateurs can pursue their interests without interference. They are sponsored by the WIA, but they are for the benefit of all amateurs. Most amateurs, WIA members or not, abide by the band plans because it makes sense to give everyone a fair go.
Clashes still occur at times, and the usual reason is lack of awareness of the band plans.
Most amateurs are willing to change frequency if the problem is explained to them politely. They should encourage spectrum efficiency, but they should also ensure that all modes have their fair share of spectrum space. They should take the popularity of each mode into account, while still providing enough spectrum space for less popular activities. Band plans must be flexible enough to adapt to changing needs, but they tend to lose support if they are changed too often. The aim must be to think ahead and to make sure that future options are not closed off.