illegal formation?

[ljudge]

I have illegal formation. 5 yards from the previous spot is the enforcement. Not having my rule book it can get tricky but I'll go out on a limb and say I would call this the way I posted it which is a foul.

Now...I suppose someone "could" raise an argument that if the player was between the 9-yard marks when the RFP was given then he satisfied the requirement. The technicality is that he's still a player (and as a player) who established himself between the 9-yard marks. He just happened to go into the team box but still remained a player. I believe if someone raised this as a argument it would be a stretch and a weak argument. Thoughts on this part of it? Anyone?