Law question (with associated cackling at Palarse)

[happypig]

Watching MotD last night there was an incident where Palace's Schlupp fell over behind the goal line with cramp. As play continued, he rolled back on to the pitch.
The commentator said that he should have been booked for re-entering the field but I thought that was wrong as he'd not had treatment.
Ignoring the hilarity of the goal and indignance of Fat Sam and the Pikeys, who is correct ?

 

[Lord Bracknell]

Is "ungentlemanly" conduct still a bookable offence?

Interestingly, my auto-correct function wanted to post that as "booable offence".

 

[Boys 9d]

Is "ungentlemanly" conduct still a bookable offence?

Interestingly, my auto-correct function wanted to post that as "booable offence".

I think it is now called unsporting conduct and is bookable.

 

[Marty McFly]

http://m.fifa.com/mm/Document/Footb.../92/44/Laws.of.the.Game.2016.2017_Neutral.pdf

Player outside the field of play
If, after leaving the field of play with the referee’s permission, a player
re-enters without the referee’s permission, the referee must:
• stop play (not immediately if the player does not interfere with play or if
the advantage can be applied)
• caution the player for entering the field of play without permission
• order the player to leave the field of play
If the referee stops play, it must be restarted:
• with an indirect free kick from the position of the ball when play was
stopped or
• in accordance with Law 12 if the player infringes this Law
A player who crosses a boundary line as part of a playing movement, does
not commit an infringement

 

[Marty McFly]

http://m.fifa.com/mm/Document/Footb.../92/44/Laws.of.the.Game.2016.2017_Neutral.pdf

...I can't find the exact text to support it, but certainly when I did the referees course around ten years ago, there was a caution for leaving or entering the field of play without permission of the referee.