I believe a fighter has a certain amount of time to attempt to cut weight from their first initial "weigh-in." Actually, I found it here
, under NSAC rule set for Boxing and MMA, NAC 467.7956 concerning weigh-ins and cutting more weight after the original weigh-in.
2. After the weigh-in of an unarmed combatant competing in a contest or exhibition of mixed martial arts:
(a) Weight loss in excess of 2 pounds is not permitted for an unarmed combatant who weighed in at 145 pounds or less.
(b) Weight loss in excess of 3 pounds is not permitted for an unarmed combatant who weighed in at over 145 pounds.
3. The weight loss described in subsection 2 must not occur later than 2 hours after the initial weigh-in.
So, if a fighter is within 3 pounds of the agreed weight limit for the bout, they have up to 2 hours to lose the excess weight after the initial weigh-in. If they are over 3 pounds on the initial weigh-in, they don't have a chance to cut any more weight without penalty. Within that limit, you have as many tries as you can to make weight up until the 2-hour time limit.
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