Multi-engined,
when these guys are operating into a CTAF where there is no traffic service when do these guys call?
There is no difference to the requirements or what they should be saying.
The requirements are, for a Straight In approach (Hi Cap RPT):
Normal CTAF arrival call (most jet operators do this at 30nm; this is mandated at YBRM and at 20nm at YAYE).
15nm, advising of intention to do a SI,
5nm, when doing a SI,
(Both these calls are required by CAO 82.5)
3nm, 1nm.
The 150nm and 10nm calls on the CTAF are not required and clog up the airwaves.
For non-SI approaches, the calls should be as per AIP, with the initial call at around 30nm (some do it earlier), then joining the circuit.