A total of 11 teams played in the tournament. The Indonesian Football Association was suspended by football's world governing body FIFA because of government interference in the Southeast Asian country's national league on 30 May 2015 but this was lifted on 13 May 2016.[2][3] However, Indonesia withdrew from the tournament.
Players born on or after 1 January 2000 are eligible to compete in the tournament. Each team can register a maximum of 23 players (minimum three of whom must be goalkeepers).
All twelve member associations of the ASEAN Football Federation were set to take part in the tournament featuring three groups of four teams, but with Indonesia's suspension, they were omitted and the AFF reverted to two groups featuring six and five teams.[4]
The teams are ranked according to points (3 points for a win, 1 point for a draw, 0 points for a loss). If tied on points, tiebreakers are applied in the following order:
Goal difference in all the group matches;
Greater number of goals scored in all the group matches;
Result of the direct match between the teams concerned;
As per statistical convention in football, matches decided in extra time are counted as wins and losses, while matches decided by penalty shoot-outs are counted as draws.
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