Again, not true.
"
Keith Kizer and Nick Lembo went on the record with the weigh-in standards for the Nevada and New Jersey state athletic commissions respectively.
In Nevada, added Kizer, the scales used go up and down by .2 pounds, so 170 pounds, 170.2 pounds and 170.4 pounds would be rounded down to 170 pounds and be considered to have made weight in the welterweight division. A fighter at 170.6 pounds or 170.8 pounds would round down to 170.5 pounds and be given up to one hour to lose the necessary weight.
In the state of New Jersey, which features another influential athletic commission, common practice includes making exact weight (or less) for championship bouts.
Nick Lembo, counsel for the New Jersey Athletic Control Board, said on Tuesday that his agency “will allow one pound over on a contract weight, unless the promoter denies such allowance. However, the caveat is that most promoters want major title fights to be dead-on weight. Thus, 170 becomes exactly 170 or less.”
In previous UFC events in the state of New Jersey, UFC officials did not request a one-pound allowance for championship bouts, added Lembo."
https://www.bloodyelbow.com/2013/4/15/4227236/ufc-georges-st-pierre-vs-nick-diaz-weigh-in-timeline