http://www.stanleycupofchowder.com/2012/8/1/3213217/bruins-nhl-chl-ahl-agreement-CBA-talks-2012
I guess being 20 is not enough.
Players drafted and playing for CHL teams are ineligible to play in the professional minor leagues (AHL, ECHL) until they are 20 years old (by December 31st of that year) or have completed four years in major juniors.
I guess being 20 is not enough.