(a) Where a racetrack uses an open stretch in which the line of pylons in the homestretch delineating the inner edge of the racing surface has been moved approximately eight feet further inside to create an “inner lane,” the following provisions shall govern racing in the open stretch;

1. (1) No horse shall be driven into the inner lane in an attempt to pass or force out a leading horse prior to the last one-eighth mile of the race.
2. (2) Horses driven on the outside shall yield sufficient room to interior horses at the end of the inner lane to stay on the course.
3. (3) During the last one-eighth mile of the race, a horse may only be driven into the inner lane for the purposes of passing a leading horse. No horse may be driven into the inner lane for the purpose of blocking a trailing horse. It shall be presumed that a horse which blocks a trailing horse in the inner lane without advancing on a leading horse is being driven for the purpose of blocking a trailing horse.