From the FA website

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(b) PLAYERS SENT OFF UNDER LAW 12 (7)
A Player who is dismissed from the Field of Play for receiving a second caution in the same match will be suspended automatically from all approved First Team matches commencing forthwith, until such time as his Club’s First Team has completed its next match in an approved Competition.

Posted By: Iwan Husarmi, Jan 29, 22:21:49