Not sure if this was discussed, but at the end of the game, ND had a short 4th down and sent the punt unit out. He pulled a switcharoo and sent all 11 men off and the starting unit back on the field and was able to get Georgia to jump offside. 

Kirby Smart was yelling saying it was not allowed and after the game said that in the SEC, it was illegal. Does anyone know if this is true or not?