UHF CB Channels is Australia

Established by law
11 To call or locate another station. Parties then switch to a conversation channel
Conversations 9,
12 to 17,
19 to 21,
24 to 30,
Used for conversations between stations
Highway Communications 40 Mainly used by Truck Drivers and other Highway users
Caravaners, Campers 18 Holiday Maker’s communication channel, e.g., when in convey
4WDrivers 10 Used by 4WD enthusiasts, clubs, convoys and in national parks.
Emergency Calling
Established by law
5 Can be used by anyone in an emergency situation ONLY. Channel 35 is the duplex/output (transmit) channel for channel 5 the duplex/input (receive) channel. Thus, no simplex communications should be initiated on channel 35 due to the potential to interfere with an emergency in progress on channel 5.
Established by law
1 to 8
31 to 38
In duplex mode, repeaters need two channels to work. Receives on 1 to 8. Transmits on 31 to 38 (automatically). When within range of a repeater, it will increase the communications distance. Operation in simplex mode on these channels is not permitted when within range of a repeater.
Data Transmissions
Established by law
22, 23 Voice transmissions not permitted on these two channels