Before revision: After the split in the 1960s between the WBC and the WBA , the divisions were narrowed, creating more champions simultaneously, and making it easier for fighters to move between different weight divisions.
After revision: After the split in the 1960s between the World Boxing Association (WBA) and the World Boxing Council (WBC) , the divisions were narrowed, creating more champions simultaneously, and making it easier for fighters to move between different weight divisions.