When action is taken outside the game by default it kicks in when the person leaves the server.
I do not see this player in locker, therefore the temp timeout should be in force if they attempt to join the next couple of days. Normally the player is no longer in the server after a report is...
there is no official rule this and would be very hard to admin this. Kicking or potentially banning them this late in the game is counter productive for the server.
I do agree they should be understanding and play fairly until more players join.