Formula One's governing body cleared the McLaren team of any wrongdoing Wednesday in its 1-2 finish at the Monaco Grand Prix.
FIA opened an investigation Monday into possible rules violations after the team ordered Lewis Hamilton not to challenge Fernando Alonso in Sunday's race. Alonso finished first, 4.095 seconds ahead of Hamilton.
FIA dropped the case Wednesday after studying the radio traffic between the team and its drivers and the FIA observer's report from the race.
"It is clear that McLaren's actions during the 2007 Monaco Grand Prix were entirely legitimate and no further action is necessary," FIA said in a statement.