The only part I would add is that where the bill does mean to refer to American laws, like U.S. laws or regulations, it does expressly refer to laws of the United States. For example, if you look at subclause 10(1), the reference there is to the laws of the United States.
Just to emphasize the point that's already been made, any general reference to an act is to a federal act of Parliament or regulation, and where it's meant to be an American law, it, in fact, refers expressly to laws of the United States.