The limitation on flight into an aerodrome that has RPT traffic also appears in CAO 95.55 section 5. This is with regard to post #33.
CAAP 166-1(2) notes CASR137.155 with regard to aircraft (who have "applied" to operate) in the vicinity of RPT.
Applying for an exemption of (for example) 10-, 19-, 25-, and 55- registered aircraft within a time window at a CTAF® aerodrome is totally justified because everyone agrees there will be no RPT aircraft scheduled during the window and the exemption details form part of the required briefing. Overkill, maybe. Its the law.