No sail shall be sheeted over or through any device that exerts outward
pressure on a sheet or clew of a sail at a point from which, with the
boat upright, a vertical line would fall outside the hull or deck, except:
a headsail clew may be connected (as defined in
Equipment Rules Of Sailing)
to a whisker pole, provided that a spinnaker is
not set;
any sail may be sheeted to or led above a boom that is regularly
used for a sail and is permanently attached to the mast from
which the head of the sail is set;
a headsail may be sheeted to its own boom that requires no
adjustment when tacking; and