As for VHF - CFA have access as do I believe NSWRFS to some of our frequencies enabling cross service communications
They are not 'our frequencies'. These VHF narrowband frequencies have been allocated nationally by the national licensing authority to emergency services. Along the SA/VIC border some of the users are, NRE, CFA, CFS, ForestrySA and probably more. That is the reason that RFS can use them locally when they come and is a little bit of sense in the total confusion that is the huge number of differing communication systems across the nation.