The AAU tournament held each January has always used 2 pitching rules, ISC and ISF. When an international team plays a North American team, the International team can require the North American team to use the ISF pitching rule which requires more restrictive movements. At the 2010 Peligro Cup in NYC, the individual pitchers got to choose their own style of pitching and one side could not determine the rules for both teams. In other words, an International pitcher could use the ISF rule and a North American pitcher could use the ISC rule in the same game.
What do you think?