The essence of that comparison is that there is a complete section missing from the police force's copy of the legislation - that is from Section 5 including the requirement, on application, to verify that the Association has more than 5 members. It's a significant omission and it begs the question, where did the WA Police copy of the Act come from.
There are lots of explanations as to why the front page of a file might have notations written on it. But the presence of a Thiess business card, with the name apparently redacted, raises in my mind questions about who provided the copy of the Associations Act to police.
The WA Associations Incorporation Act - one for the super sleuths please - Michael Smith News: