I can't remember the exact figure from Rally Australia last year, but I think the WRC standard for roads which are not otherwise limited (e.g. forestry roads or private roads) is 80 km/h max. That limit can always be changed by the individual event's Clerk of Course, especially on safety grounds. After 3 collisions with the public during recce in 2015, I'm pretty sure the maximum speed limit on the Rally Australia forest stages was set by the CoC at 60 km/h for 2016. My memory is hazy because they had enough volunteers so I ended up not needing to go out on recce supervision.