The 36 year-old, who out-pointed Saul Alvarez to claim the WBC and WBA 154lb titles in September, also holds the green belt at 147lbs and the World Boxing Council have informed WBN that a decision must be made by the stipulated date.
Mayweather had said in the past that he would remain at welterweight for the foreseeable future until the Alvarez offer was accepted and it is still thought that the pound for pound star intends to head back down to his natural division.
The five-weight king has been strongly linked to a clash with Amir Khan in recent months, although since Manny Pacquiao returned to winning ways a fight between the two is once again dominating headlines.
If that encounter was to ever happen, it would certainly be made at 147, as would the Khan fight, so it looks highly possible that Mayweather will give up the light-middleweight titles in the next two weeks unless an extension is granted.
Lightweight title holder Adrien Broner has already had a lengthy period approved by the WBC for confirmation of his next defence after the ‘The Problem’ took the WBA welterweight belt from Paulie Malignaggi earlier this year.
Broner is ready to defend his new belt against tough Argentine Marcos Maidana on December 14 and will then have to inform the WBC whether he intends to keep the 135lb title or stay at his new weight of 147, which could all depend on the result of that clash.
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