You will need to check with your local Public Trustee. (moneysmart.gov.au)
The states and territories differ in terms of what a power of attorney can do, so it's best to check with your local Public Trustee. (moneysmart.gov.au)
Years ago, when I was Public Trustee in Saskatchewan, I was asked to approve a settlement of a personal injury action on behalf of a child, in which the settlement amount was reduced by the amount of the parents» contributory negligence. (slaw.ca)