Lake Walyungup - Seasonal Restrictions?

This morning, when I was setting up to buggy, a couple of rangers came over to talk to me. There are apparently seasonal restrictions in place which apply to kites and buggys as well as the land yachts, which prevent us from buggying during the winter - due to safety concerns, but the ranger wasn't sure?

The cars are allowed to drive on the lake, even when it is inundated, for the model aero clubs, but land yachts, kite buggies etc are restricted.

I have emailed the local council and also DEC for confirmation about this, if I haven't heard anything more by the end of the week I will follow up with a letter.

Looks like no buggying until I get an answer...