Lomachenko-Martinez Edit: Actually, on a second though, I think the winners of both of those fights should fight afterwards to prove who's really the #1.
You are correct. My bad. Nobody ever refers to boxing's divisions by their uppermost limits. You never see anybody discuss the goings-on "at 160lbs". How absurd. What the hell was I thinking?
Why would you use something that doesn't actually exist to refer to weightclass when they're all based on what is a constant "upper limit". That's a lot better than some subjective weights that fighters may or may not come in at below it? Also, remembering the actual limits is a lot easier in many cases than the names for the divisions, especially when there's so many of them and there's different ways to refer to them depending on who you ask, where "super", "junior" and "light" is used varyingly (e.g. WBA/WBC calls 130 "Super Featherweight" as you do, IBF and WBO on the other hand call it "Junior Lightweight"). 130 is 130 though.
There's no such thing as minimum limits in any weight class. You can be 99lb soaking wet and challenge for a super featherweight title if you so choose.
Didn't Pacquiao put weights in his pockets for his debut because he was below the minimum weight required at weighed only 98lbs in reality or something? It might not be official or whatever but I'd assume to be sanctioned, they wouldn't allow somebody to fight at 130lb if they did weigh 99lb soaking wet, even in these commissions than still give James Toney a boxing license when he can barley friggin talk.
It definitely wouldn't be official. I suppose it would be down to individual discretion on the part of the commissioners. That was an exaggeration, however. My point is that you can be scheduled to compete for a light middleweight title and come in 142lbs at the weigh-in and nobody is going to say you can't box for the prize. If you come in at 154.125, however, and can't lose the extra two ounces, you are ineligible for the belt.
There are minimum weights in AIBA/amateur boxing however. Which I think is fairer, because at least in theory it encourages fighters to weigh in closer to their natural weight, rather than dehydrating and just making the maximum before rehyrdrating to get an advantage.
Essentially what determines the division is the weight of just one fighter. Pacquiao weighed 145 vs Margarito but Margarito was 150, so it was a light middleweight fight, and couldn't be a welterweight fight.