Two clubs would be relegated as the league would be expanded to 12 teams for the 2006 season.
The team that finished in 8th position would play in a relegation play-off.
The King's Trophy was an end of season match between the two clubs that finished first and second in the final Premier League standings.
Thailand Tobacco Monopoly, who won the Premier League, beat league runners up Provincial Electricity Authority 4-1.
The Queen's Cup was postponed because of lack of sponsorship, will be held next year but with reduced prize money.