Well technically a licence condition is not a law contained in an Act. But it is certainly a subordinate regulation that has the full force of the parent Act. So in affect a licence condition is a law (provided it is legally valid under the parent Act and/or any other Act that takes precedence over the parent Act)
Sent from the Throne
Operating a device beyond the conditions of its licence is specifically a breach of the radio communications act, sect 46:
Commonwealth Consolidated Acts
RADIOCOMMUNICATIONS ACT 1992 - SECT 46
Unlicensed operation of radiocommunications devices
(1) Subject to section 49, a person must not operate a radiocommunications device otherwise than as authorised by:
(a) a spectrum licence; or
(b) an apparatus licence; or
(c) a class licence.
Penalty:
(a) if the radiocommunications device is a radiocommunications transmitter:
(i) if the offender is an individual--imprisonment for 2 years; or
(ii) otherwise--1,500 penalty units; or
(b) if the radiocommunications device is not a radiocommunications transmitter--20 penalty units.