Earl Warren,
United States v. International Boxing Club of New York…
“ A 'world champion' gains his title by defeating the existing champion or by eliminating all contenders, and remains world champion in his division until he is, in turn, defeated by a contender or resigns the title. Such a title affords to its holder financial returns from personal appearances and exhibitions throughout the United States, from endorsements and other activities, as well as a greater percentage of the receipts from his bouts. The promotion of professional championship boxing contests is also more lucrative than the promotion of other boxing contests. ”
