The subsection states that the league falls under «[b] usiness leagues, chambers of commerce, real - estate boards, boards of trade, or professional football leagues (whether or not administering a pension fund for football players), not organized for profit and no part of the net earnings of which inures to the benefit of any private shareholder or individual.» (rocketlawyer.com)
usiness in all seriousness when time comes to sign as well. (cars.com)