Got one online at the Imbil store last week, sent through to my phone. They have an Ipad there set up ready to go. They told me that's all I needed. It showed my name, the permit number, and the start date.
My mates were checked out by Water Police and Fisheries on the dam a couple of days later and didn't mention any probs apart from a warning about out of date cylinder on an inflatable life jacket.