The British Boxing Board of Control have warned all those involved in the impending heavyweight promotion between David Haye and Dereck Chisora will be automatically stripped of their licences.
And their warning tonight means any licence holder - including the promoter, managers, seconds and other fighters on the bill - will be deemed to have broken the terms of their membership, and instantly be stripped of their license.
The Board said in a statement: "The Articles of Association...of the British Boxing Board of Control, to which every member has agreed to be bound, make it perfectly clear that the objective of the BBBoC is to control and regulate boxing in the United Kingdom.
"Any member of the BBBoC who participates in any way in a promotion such as that referred to above would thereby evince an intention not to be bound by the Constitution of the BBBoC and would act in a manner wholly incompatible therewith.
"In such circumstances the BBBoC would accept that member's repudiation of the Constitution as terminating his/her membership of the BBBoC and his/her licence."
British boxers David Haye and Derek Chisora will fight at Upton Park on July 14.
They hosted a joint press conference in the stadium to announce the fight today, but were separated by a metal fence.
Boxing promoter and Dereck Chisora manager Frank Warren has said there is "nothing illegal" about the fight sanctioned by the Luxembourg Boxing Federation during a press conference at West Ham's Upton Park.
Frank Warren has defended his decision to pit Dereck Chisora against David Haye in a heavyweight grudge match. Chisora is currently appealing the British Boxing Board of Control's decision to strip him of his boxing licence.
"The hearing was put back to July so Dereck will have effectively been out of the ring for six months and that equates, if he was a footballer, to being out of action for 24 matches," Warren told BBC Radio Five Live.
"He has lost half of his purse in sanctions and costs since the Klitschko fight.
"He has no qualifications, the next thing for him to do would be to sign on.
"He is not banned from boxing. The fight has been licenced by the governing body in Luxembourg, which has the same standards as the British Boxing Board of Control.
"It is the biggest fight of the year and the fact of the matter is that the fight is legal, lawful and will go ahead."
David Haye and Dereck Chisora sparked outrage when they brawled after the Zimbabwean-born Londoner lost on points to WBC heavyweight champion Vitali Klitschko.
Chisora also spat water at WBA, IBF and WBO champion Wladimir Klitschko in the ring just before the fight against the Ukrainian's brother.
The post-fight brawl led to huge condemnation from across the boxing world, and caused a police investigation.
Haye handed in his licence in October last year when he retired following his embarrassing defeat to Wladimir in Hamburg - a defeat he partly blamed on a broken little toe.
Boxers Dereck Chisora and David Haye are to enter the ring at West Ham's Upton Park this summer, Chisora's manager Frank Warren has confirmed.
Chisora was stripped of his boxing licence by the British Boxing Board of Control (BBBOC) after he slapped Vitali Klitschko before their February fight and brawled with Haye in a press conference that followed the bout, which Warren's fighter lost.
Chisora appealed against the BBBOC's decision but that hearing has been put back to July and the fight has instead been licenced by the Luxembourg boxing association.