On June 30, 1947, the CAHA, the National Hockey League and the Amateur Hockey Association of the United States makes an agreement that no player under the age of 18 can be signed as a professional player without the permission of their amateur club. That same year, the International Ice Hockey Federation changes the rules on amateur status. The rule change means the 1948 Allan Cup champion Royal Montreal Hockey Club were not eligible for the 1948 Winter Olympics, so the CAHA sent the RCAF Flyers instead and were victorious.