There has been a lot regarding the Ellis Defence as such.

“Put simply, when a Catholic priest commits sexual abuse, it does not happen in the "Catholic Church" because there is no such legal entity. It happens, instead, in one of the thousands of unincorporated parts of the church”.

The church says different see links below;

There is heaps to look at and research here.
October 2018 - The Federal government has removed the 'Ellis defense' churches used. We hope the start of a little transparency.