Shortly after UFC 158, a video surfaced of the UFC's Senior VP of Business and Legal Affairs Michael Mersh explaining Montreal's unusual weigh-in rules to Welterweight title challenger Nick Diaz. Mersh explained that the Quebec commission doesn't account for the decimal so a weight as high as 170.9 would be the same as 170.0. The awkward "off the record" exchange added a hint of controversy to Diaz's unanimous decision loss to Georges St. Pierre.
On Tuesday, Jonathan Tweedale, representing Diaz's camp, infored MMA Fighting that they'll be filing a complaint in regards to the weigh-in controversy as well as an issue with the drug testing procedure:
The Quebec Commission's statement is a disappointing admission that the March 16 event was not conducted under the rules applicable to a UFC title fight - or under the rules the fighters contractually agreed to, upon which rules Mr. Diaz was entitled to rely under his bout agreement.
"Further serious irregularities including, inter alia, the Quebec Commission's failure to supervise fighters' provision of samples in connection with testing for Prohibited Substances and Prohibited Methods (under sections 71.1 to 71.6 of the Regulation), will be set out in an official complaint that will be filed imminently,"
"Section 168 of the Regulation respecting combat sports provides that the maximum weight that a fighter must achieve at the official weigh-in shall be determined in advance by contract - and if the fighter does not make the contracted weight - in this case 170 pounds - then 20% of his purse or "the contestant's remuneration" will be deducted and paid to his opponent (subsections (7) and (8)). The contracted weight for this fight was 170 pounds. 170.9 is not 170, anywhere in the world, for a title fight. There is no question what "170 pounds" means, in the bout agreement, as a matter of contractual interpretation.
"The Quebec Commission deliberately relaxed the rule in this case and, by its own admission, allowed their home-town fighter to 'make weight' even if he weighed more than the contracted weight."
"In the circumstances, Mr. St-Pierre remains legally and ethically obligated to fight Mr. Diaz at 170 pounds or else vacate the belt in favor of those prepared to fight at welterweight."