kurt88 said..
as I understand it once a gas fitting or appliance has been installed by a licensed gas fitter and certified its certified for life.
any changes ,modifications or alterations will require a new gas certificate.
the system still should be maintained and checked for leaks regularly with soapy water
Kurt, this seems to be the case.
In NSW it seems Fair Trading is the authority, seems a bit odd, I have emailed them for advice.