as i understand it if the road you are using has a name then it is a registered road which means that road rules apply weather it is dirt or tar the vehicles on that road must be registered with drivers with drivers lic which is the law here in w.a.
my son was in a car accedent on a dirt track where he let his unlicenced cousin drive they hit a tree and wrote off his triton my son was fined and my nephew was fined charged dangerous driving and had his licence suspended for 12 mths
