Illegal shift, or not?

[JugglingReferee]

Originally Posted by Bullycon

A ball, 1st and 10 from A25 yard line. Guard, Tackle and Split End lined up to the left of the Center. On the line to the right of the Center are the RG, RT, A10 and A15. A10 is lined up inside of A15.

A10 realizes that he does not want to be on the line, and takes a step back. Before he has been set for a second, A snaps the ball.

CANADIAN RULING:

Legal. Setting for 1 second are for linemen. Since he stepped off the line, he's ok.

Edit: if he broke a 3- or 4-point stance, kill the play for IP.