Mountain Bikes on multi day walks?

Does anyone know where we we can find restrictions regarding the use of mountain bikes on PWS websites? Thanks in advance.
Information for bushwalkers from bushwalkers
https://bushwalk.com/forum/
GPSGuided wrote:The other good thing about rail tracks is that they are all very rideable. All perfectly graded that if a locomotive can get up, it's also good for cyclists. No killer climbs en-route.
whynotwalk wrote:As an aside, I was discussing with some riding mates the idea that a rail trail could be set up between New Norfolk and Maydena, using the now-disused rail track. ......Just a thought![]()
Overlandman wrote:Passed an Asian guy carrying one on the Overland Track back in the 90's![]()
Regards OLM