The critical legal distinction is HMAS Perth ship-zone permission, not a general Australia-wide dive fee. The Commonwealth ABLIS listing says permits cover entering the zone, diving and mooring; the City of Albany sets requirements and has not published a reliably verified individual tourist price in the reviewed material. Government permit listing.
The state parks authority publishes a standard AUD 17 per-vehicle day fee for fee-charging national parks such as Torndirrup, subject to exemptions, current pricing and passes. No separate universal Albany tourism levy or King George Sound dive marine-park tag was verified, so neither has been invented. Parks fees.