A racetrack must be:(1) for a Class 1 racetrack, at least 90 feet wide on each straightaway and at least 80 feet wide on each turn;(2) for a turf racetrack, at least 80 feet wide on each straightaway and at least 80 feet wide on each turn; and(3) for a Class 2, 3 or 4 racetrack:(A) at least 30 feet wide on each straightaway for the first two horses in a race and an additional five feet wide for each additional horse in a race; and(B) not more than 10 feet narrower on each turn than on the straightaway.