Schedule 5 can no longer be used if there is a maintenance program for the aircraft. There is a CASA listing for what aircraft can use Schedule 5 if your aircraft is not on it you cant use it. Therefore you need to have your log book statement changed and sent to CASA, this means Manufactures program or spend the money and have your own approved but you must be able to prove what you are submitting, which means now that SIDS MUST be done on ALL aircraft in all cats.
Now go to CASA and get a definition for the word RECOMENED. They will not give it to you. In a court it means you MUST. Meaning 30000 hours game over thanks for coming. Same as the engine 12 years inspection, sorry it must be done. We have now nearly all that was covered under Aust AD;s gone and now manufacture's rule, As to the other post here is why costs of servicing is increasing to cover cost of research to do the maintenance as it cost the same to employ a person to do the work as to do the research to be able to do it.
Welcome to not our fault CASA system.
I might add that this goes for all components on an aircraft, ie tyres to wheels to windscreen to the fire extinguisher, everything has to be looked at.