523 CMR 22.07
Weight Classes
Unless otherwise indicated, there shall be rankings and a champion in each of the following nine
weight classes:
(1) Heavyweight;
(2) Cruiserweight;
(3) Light-heavy weight;
(4) Middleweight;
(5) Welterweight;
(6) Lightweight;
(7) Featherweight;
(8) Bantamweight;
(9) Flyweight.