The CAHA informed the Oil Kings that they were required to play in a junior hockey league for the 1966–67 season or would be held ineligible to compete for the Memorial Cup. This led Hunter to form a new league with five former members of the Saskatchewan Junior Hockey League (SJHL), the Estevan Bruins, Regina Pats, Saskatoon Blades, Moose Jaw Canucks, and Weyburn Red Wings, to leave the SJHL and join the Oil Kings and the Calgary Buffaloes in a new league known as the Canadian Major Junior Hockey League. Despite concerns that this new league would see the demise of the Alberta and Saskatchewan leagues, the governing bodies in both provinces sanctioned the new league. The CAHA did not, however, declaring the CMJHL to be an "outlaw league" and suspending all teams and players from participation in CAHA sanctioned events. The new league accused the CAHA of overstepping its boundaries and with the support of the players and their families, chose to play the season regardless. The CMJHL began legal action against the CAHA executive in March 1967, since the CAHA had suspended CMJHL teams and ruled the teams ineligible for the Memorial Cup playoffs. In May 1967, the CMJHL renamed itself to the Western Canada Junior Hockey League (WCJHL). Initially, the new league deliberately avoided including the term "Western" in its moniker, as some of its founders wanted to keep open the possibility of inviting top Eastern junior clubs to join in a national elite junior league in case negotiations with the CAHA reached a complete impasse. The new CAHA-NHL development agreement came into effect July 1, 1967. The new pact ended direct sponsorship of junior teams by the NHL which then paid development fees to the CAHA, and junior players became eligible for the NHL Entry Draft at age 20. In May 1968, Bill Hunter announced the league would use an age limit of 21 in defiance of the CAHA and NHL agreement. The WCJHL stopped short of declaring independence from the CAHA, and claimed that the lower age limit would decrease its talent pool and negatively affect ticket sales. In response, the CAHA suspended league and its players. On June 10, 1968, the WCJHL announced a name change to the Western Canada Hockey League (WCHL), and that it was leaving the CAHA to affiliate with the rival Canadian Hockey Association (CHA). Hunter became chairman of the board for the WCHL, and Ron Butlin became president of the WCHL and the CHA.