What is the five-second vision rule for WA motorcycle riders on curves?

1. You must be able to stop within a 5-second sight distance at all times
2. You must slow down so that your speed allows you to see at least 5 seconds ahead before entering a curve
3. You must leave 5 seconds between your motorcycle and a vehicle ahead on curves
4. You must look 5 seconds into the future to anticipate hazards