Yes Sunny-Jim, RA-Aus also has the requirement for flight reviews every 2 years. Your GA AFR will cover you for high-performance RA-Aus renewals usually.
I don't think Transponder use as such and adherence to VFR levels is beyond the education level of an RA-Aus pilot, however they (as the operator of the aircraft) do need to know that it must comply with the regs and be calibrated every 2 years. Last thing anyone wants is an auto-avoidance from an airbus up top because someone didn't bother getting their transponder checked out. That one certainly got the attention of the pen-pushers in the CASA head office!