legal and illegal kicks

[Theisey]

Here are a few that come to mind.
(a) A return kick is an illegal kick
(b) A scrimmage kick that is made when the kicker is beyond the NZ.
(c) using a tee or tee like device on a scrimmage place kick

in (a) the play is blown dead at the time the illegal kick is made. Mark off 5-yards from the spot if the kick.
in (b) again, the play is blown dead at the time of the illegal kick. Mark off 5 yards from the previous spot and the down counts.
in (c) mark off 5 yards from the previous spot. Ball is live until it becomes dead by rule.

I think there might be one more, but I'm drawing blanks at the moment.