2M3. Gaining Laps.
(a) A rider shall be considered to have lapped the main group upon reaching a position to take shelter behind the main group. (A rider or group of riders shall be considered to have taken shelter behind the main group when the distance between the last rider in the main group and the first rider of the overtaking group is less than 5 meters or 16 feet.)
(b) Riders who break away continue to score points until they have lapped the main group. Once they have lapped the main group, they must sprint with this group to score additional points, even if they catch the group during a sprint lap.
(c) If the riders are strung out so that no main group exists, the chief referee shall determine when a rider or group of riders has passed enough riders to be credited with having gained a lap.
(d) Riders who lose contact with the field, and are then caught by the leaders, may not lead. Riders attempting to gain a lap may not accept assistance from riders who have lost contact with the back of the field. Riders attempting to gain a lap may work together, but no sacrifice of a rider's position to the advantage of another rider shall be allowed.
2M4. Losing Laps.
(a) Riders who lose laps may sprint for points only after being absorbed by the main group prior to the beginning of the sprint lap. A rider may be considered to be absorbed when caught by the lead rider in the main group. Riders may win points regardless of how many laps they have lost.
(b) A rider who gains a lap and then loses contact does not lose the lap until absorbed by the main group.
(c) Riders who fall two or more laps behind and are considered to be out of contention may be withdrawn at the discretion of the Chief Referee.