|McMahon celebrates in Zambia PIC via Twitter Kevin Byrne|
|PIC VIA WomenBoxing|
This is a title offered when for some serious reason the World Champion cannot fight. It can only be fought between two highly-ranked fighters in that same division. That means McMahon is a World Champion as both titles are valid simultaneously.
The No 1 Ranked World Champion holder must fight the holder of the Interim belt or forfeit the title.*
*Updated May 7th to clarify what an Interim title is.