(1) Except upon approval by the board, the weight classes for mixed martial arts unarmed combatants are as follows:

(a) Flyweight                                                                                       up to 125 lbs.

(b) Bantamweight                                                                               over 125 to 135 lbs.

(c) Featherweight                                                                               over 135 to 145 lbs.

(d) Lightweight                                                                                    over 145 to 155 lbs.

(e) Welterweight                                                                                 over 155 to 170 lbs.

(f) Middleweight                                                                                  over 170 to 185 lbs.

(g) Light heavyweight                                                                         over 185 to 205 lbs.

(h) Heavyweight                                                                                  over 205 to 265 lbs.

(i) Super heavyweight                                                                        over 265 lbs.

(2) Following weigh-in of mixed martial arts unarmed combatants, the following weight loss is not permitted:

(a) in excess of two pounds for combatants weighing in at 145 lbs. or less; and

(b) in excess of three pounds for combatants weighing in at over 145 pounds.

(3) The above weight loss must not occur later than two hours after initial weigh-in.