The law book says “open play” so I don’t think it applies to PK.
I think he means a penalty is treated the same as a PK, such that the kicking team gets possession.
Law 19.1 says "An unplayable maul after
kick in open play", and the definition of open play is "The period after a kick-off, restart kick, free-kick, penalty or set piece and before the next phase, or the period between phases of play, excluding when the ball is dead." Although the catch following a penalty kick is during open play, law 19.1 is focused on when the kick was actioned, not the catch.
I suppose one can argue this is reward for the kicking team, same way the kicking team gets the throw to the lineout from a penalty.
Since the Laws like to align and keep things simple
, a 50-22 does not apply at a kick-off or any type of restart kick (therefore does apply from a PK and FK), and a mark may not be claimed from a kick-off or a restart kick
after a score (does apply from a PK and FK). If I'm interpreting this correctly, a 50-22 does not apply after a 22DO or GLDO if the ball was touched down, but a mark can be claimed because nobody scored, and I assume both a 50-22 and mark can be claimed from a 22DO or GLDO if the ball was made dead because nobody has touched it down (actually I assume this is not the case)
(Restart kick = The method of restarting play with a drop-kick
after a score or a touch-down.)
