Fury has also had issues with UK Anti-Doping, the agency that oversees drug testing in his home country, because he failed a drug test for the performance-enhancing steroid Nandrolone related to a 2015 fight - a fight that took place before he faced Klitschko - for which results were not disclosed until June 2016.
"If he does not enroll, then the WBC can not sanction the fight", Sulaiman exclusively told Sky Sports.
And the Briton has taken that advice on board, with Sulaiman confirming that Fury has now signed up.
Few men on planet Earth can match Fury for mind games and verbal jousting before a fight and the lineal world champ was once again on fine form as he looked to get the upper had on the WBC king before they have even stepped into the ring.
Wilder co-manager Shelly Finkel confirmed to ESPN he had been notified that Fury's paperwork for the program was complete.
While sitting with Fury, the champ said he was part Nigerian, unfortunately, he didn't expand and since the line was a throwaway one, we aren't quite sure how he fits.
Wilder, who was cooperating with the officers of VADA.
"We wrote to (Wilder's camp) after our fight with Povetkin and said we need to make our move soon because of mandatories in place for April 13, so could we have a meeting", Hearn added.
Loud megafit in the heavyweight division between DevTeam Wilder (40-0, 39 KO's) and Tyson fury (27-0, 19 KO's) in jeopardy.
Note that Wilder is known for fierce support for doping tests from WADA and is one of the most vocal critics of the fighters that avoid tests or caught using banned drugs.