They have always required helmet, closed shoes, long sleeve shirt and pants in the past and you need to remove anything not nailed down in the car eg mats, refidex and even spare tyre if you can't convice whoever is checking the car that the strap is good enough. They will check your brake pads and if they are really crap will not let you on the track. That being said they are a good bunch of fellas who just dont want to see you or your car destroyed. They do let passengers in the car with same clothing/helmet requirements as driver.