The first page of the document explains it all, however: Innovation patents are a new type of patent available only in Australia. [...] Innovation patents are

The first page of the document explains it all, however: Innovation patents are a new type of patent available only in Australia. [...] Innovation patents are granted without examination, usually within 1 to 3 months, whereas standard patents are examined only after paying the examination fee, and usually take 2 to 4 years. After an innovation patent has been granted, the owner or any person may request examination, and such examination must occur before the owner can commerce or threaten to commence infringement proceedings. So basically you could submit anything you want as an invention patent. The paper is more or less worthless as long as you don't get it examined.