In this I'd be replacing, as you see, a few lines. The effect is to insert the concept that an aboriginal governing body would become a category of entity that could be reimbursed for reasonably incurring expenses in relation to a release.
As things now are listed, the only entities eligible to receive reimbursement for expenses that were reasonably incurred because of a release would be Her Majesty in right of Canada or a province, and then it includes “or any other person”. But “person” doesn't seem to incorporate the notion of a first nation. That's why the amendment reads “aboriginal governing body” and then “or any other person”.