The sanctioning body has ordered both fighters to get it on for its vacant lightweight title. Now, the teams have 30 days to work out a deal. If one isn’t made in the allotted time, a purse bid will be called.

The WBC somehow skipped over interim titleholder Jadier Herrera.

The title became vacant after former champion Shakur Stevenson outpointed Teofimo Lopez to win the WBO 140-pound belt on January 31. The WBC prohibits its champions from simultaneously holding world titles from other governing bodies in weight classes separate from divisions in which they hold WBC belts.

Zepeda (33-1, 27 KOs), ranked No. 1 in the WBC, hasn’t fought since he lost a one-sided decision and his perfect record on July 12 against then-champion Stevenson, who held the 135-pound title at the time.

Roach’s fortune hasn’t been much better, as the former 130-pound belt holder had to settle for a pair of majority decision draws last year. He drew with Gervonta Davis at 135 on March 1 and Isaac Cruz for the WBC interim 140-pound title on December 6.