I've just heard through the grapevine that national park fees are set to increase on Oct 1 for a number of popular parks that divers frequent. These include the Similan Islands NP and the Surin Islands NP, among others. The current fees for these two parks, which are generally charged as an add-on for liveaboard trips but most often are folded into daytrip prices, are THB 400 entry fee (per entry) with an additional THB 200/day for divers. So for the typicial 4-day liveaboard trip to the Similans and Richelieu, the total for divers has been THB 1600 [400 for Similans + 400 for Surins + (200 4 days)]. The reported increase will be to THB 500 per visitor for the entry fee; I haven't seen any report of an increase in the daily user fee for divers, but I wouldn't be surprised if that were to be increased as well. If this report is accurate and these increases are implemented, the total park fee for a 4-day liveaboard tour of the Similans/Richelieu will go up to THB 1800, and perhaps more if the user fee is also increased.