IMO . . .
If a player is at the machine . . . NO COACHING.
If a player isn’t at the machine . . . COACHING IS FINE.
If a player is at the machine . . . NO AIDS.
If a player isn’t at the machine . . . AIDS ARE FINE.
THE END 
IMO . . .
If a player is at the machine . . . NO COACHING.
If a player isn’t at the machine . . . COACHING IS FINE.
If a player is at the machine . . . NO AIDS.
If a player isn’t at the machine . . . AIDS ARE FINE.
THE END