The WBC has lifted Dillian Whyte's suspension after he was cleared by UK Anti-Doping last week.
The British heavyweight has been reinstated as WBC interim champion and will be given a chance to fight in February 2021 for the full title - after Tyson Fury has fought current champion Wilder for a second time.
A WBC statement said: "Based on a limited but detailed investigation and after collecting information, including the WBC's consultation with two independent experts, [UKAD] concluded that there was insufficient evidence that Mr. Whyte intentionally ingested a prohibited substance in order to improve his performance."
In light of the WBC's own finding and the withdrawal of UKAD charges against Mr. Whyte, the WBC has closed its internal investigation.
"The WBC lifts its provisional suspension and confirms Mr. Whyte's recognition as WBC interim world champion.
"Interim champion Whyte will become the mandatory challenger of the division immediately after the mandatory defence of champion Deontay Wilder against the current one mandatory challenger Tyson Fury.
"The mandatory defence against Whyte must be carried out before February 2021."
