Between 1953 and 2003, the championship was normally earned in round-robin regular-season play among all conference members, although in earlier years league teams did not typically play every possible ACC opponent. The league did not employ tiebreaking procedures, such as head-to-head results, to determine a single champion, and thus it was not unusual for a season to end with "co-champions." With a 2004 expansion of the league to include Miami and Virginia Tech, round-robin play became impossible due to an NCAA limit on the number of games a team may play during the season and the unwillingness of the league to hold more than eight conference games per season per team. NCAA rules also forbade a championship game due to the league having only 11 members.