I was reading this article on the stoush between ISX and the ASX...

I was reading this article on the stoush between ISX and the ASX regarding their trading halt - disallowed/business/markets/isignthis-and-asx-trade-blows-over-asic-s-role-in-its-suspension-20191111-p539cd.html - when this quote caught my eye:

"They said, based on the regulatory queries which have been made public so far, "we do not yet understand why there was a need to place ISX into suspension"."We question why the ASX cannot 'front-end load' its questions to expedite its investigations," said their update to investors."

Bolding is my emphasis - with regards to the time taken to respond, if the ASX is in the habit of asking one/a few questions at a time, and then waiting for a response before posing further questions, then it is understandable how this process could stretch into months.