Impeding the progress of an opponent means moving into the opponent’s path to obstruct, block, slow down or force a change of direction when the ball is not within playing distance of either player.
There is no offence of obstruction. Obstruction may form part of impeding progress of an opponent but it is not a named offence as such.
The FA does not have their own laws ... The laws are written and maintained by IFABFA Laws of the Game
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Obstruction, or impeding the progress of an opponent, is when a player unfairly uses their body to prevent an opponent from getting to and/or playing the ball.
IFAB
This does not appear in the IFAB laws of the game