I may be wrong but I thought the commission would "only" be able to make findings and recommendations for lawmakers. It has the power to summon, fine and even imprison but only on grounds of "contempt of court" as in refusing to appear or provide requested evidence. Hence GB Jackson was dragged screaming and kicking to the stand.
It's (final) findings are "fact" I believe as in when the ARC has "found that" something is the case it carries the same weight as a law court finding and its findings can then be used (as a sort of precedent) to be used to support lawsuits for victims of abuse.
But I don't think that of itself it can (e.g.) say WT Oz must pay $50,000Aus to every victim but it can recommend financial redress amounts to the lawmakers (government?) of Australia.
Someone will be along to correct my thoughts I'm sure.
Edit: Sorry Smiddy - I didn't read your post before posting mine!