Xavier,
There will be a short class before the rally to explain it all. But, it's really pretty simple: You are given a set of maps and instructions. The instructions tell you where the checkpoints are on the maps and exactly what time to be there.
You drive to the checkpoint and find a timing car there with a hose stretched across the road. You drive across the hose on the exact second that you are supposed to be there (not early or late). Then, you stop at the timing car and they write your score on your timing card.
You proceed to each checkpoint, in order, and collect all your scores. The team that does this most accurately wins the trophy. There are three different classes and beginners have just as much chance of winning as us old timers.
You do not have to speed. You do not have to do any wild maneuvers. Just find the right place and be there on time,
exactly on time. This is harder than it sounds and that's where the fun comes in. I practice by running over a broomstick many, many times. We usually hit most of the checkpoints on the zero. It's like golf, the lowest score wins.
The other things that make it fun are the interesting roads and scenery that the Rallymaster takes us through. Also the chance to see how your car compares to other cars. Some people like to go faster. Others like to take it real easy. Which group are you in?
Rallysnake