(a) a Coxswain;
 (b) six (6) regular oarspersons;
 (c) a spare oarsperson who, (at the option of the coxswain and the regular oarspersons) may substitute for any regular oarsperson in any Regatta activity as prescribed by these Rules; and
 (d) a coach and/or manager (at the option of the remainder of a crew).