XI.—The umpire shall be sole judge of a boat's own water and due course during a race, and he may caution any competitor when in danger of committing a foul.
XII.—The umpire, when appealed to, shall decide all questions as to a foul.
XIII.—Every boat shall abide by its accidents, but if during a race a boat shall be interfered with by any outside boat, the umpire shall have power, if he thinks fit, to re-start the boats according to his discretion, or to order them to row again on the same or another day.
XIV.—No boat shall be allowed to accompany or follow any race for the purpose of directing the course of any of the competitors. Any competitor receiving any extraneous assistance may be disqualified, at the discretion of the umpire.
XV.—Boats shall be held to have completed the course when their bows reach the winning post.
XVI.—Any competitor refusing to abide by the decision of the umpire, or to follow his directions, shall be disqualified.
XVII.—The umpire, if he thinks proper, may reserve his decision, provided that in every case such decision be given on the day of the race.
XVIII.—The jurisdiction of the umpire extends over a race and all matters connected with it, from the time the race is specified to start until its termination, and his decision in all cases shall be final and without appeal.