Jurisdiction, maybe. However Enforcement would be an issue, he's the Winter knight. Sending Wardens to chop off his head would be an act of war, especially if he broke the laws under Mab's orders.
That was not what I was wondering about. I was wondering about the practical aspects, would breaking the Laws corrupt Harry. I settled on Yes, because he is still fundamentally a Mortal wizard.
That said, I think Harry is no longer on the Council. He's the Winter Knight now, and you can't serve two masters.
Molly is the trickier issue, because unlike Knights, Ladies are not mortal (apparently? Before Cold Days it was always assumed that the Queens were born Sidhe, but apparently they can be Mortals). WOJ said that when Fix and Lilly got their mantles, Fix chose to be mortal and Lily chose to be Fairy in order to accept the mantles. Molly is not a changeling, so it's unknown if the mantle physically changes her.