Radiocommunitions Act 92 Section 108

A person

must not operate, or permit operation of, the transmitter:

                              (i)  in a way that would be likely to cause reasonable persons, justifiably in all the circumstances, to be seriously alarmed or seriously affronted; or

                             (ii)  for the purpose of harassing a person; and

https://www.legislation.gov.au/Details/C2017C00356