what ASIC are saying in this sentence is that over the period...

what ASIC are saying in this sentence is that over the period from 2010 til 2018 ASIC that random assessments have resulted in material changes to a percentage of annual reports assessed, nothing more.

For ASIC to give ISX a clean bill of health on its 2018 annual report it would have had to be included in this random sample and not made any material changes to its annual report based on any ASIC findings, which on the basis of the content of the media report you simply cannot draw that conclusion.

If you cannot understand some simple sentences you are clearly trying to obfuscate the meaning of information contained in the report to suit your own narrative.