4.02 Meaning of screened air service
(2) An operation of an aircraft is a screened air service if:
(a) all of the following apply in relation to the operation:
(i) the operation is a regular public transport operation or an open charter operation;
(ii) the aircraft has a seating capacity of 40 or more persons;
(iii) the operation operates from a designated airport or a tier 1 or tier 2 security controlled airport; or
(b) all of the following apply in relation to the operation:
(i) the operation operates from a designated airport;
(ii) the aircraft departs from the same apron as an aircraft (the other aircraft) that is operating a screened air service to which paragraph (a) applies;
(iii) the aircraft is scheduled to depart within the operational period of the other aircraft.
(3) For subregulation (2):
apron, for an airport, means an apron described in the document accompanying the TSP of an operator of a security controlled airport in accordance with subregulation 2.13(1B).
Looks to me like the only way in which an RPT or open charter operation in an aircraft with a seating capacity of 40 or more persons can escape being a 'screened air service' is if it operates from an airport that is neither a designated nor Tier 1 nor Tier 2 nor Tier 3 security controlled airport. (But, as with most of aviation in Australia, there are probably exemptions buried somewhere.)