Canon Law in Time Travelling?

If you travel to a time before canon law exists, does that mean youare suddenly exempt or it does? It not matter, because god and his precepts are outside of time. At least you would not be bound by what's called merely ecclesiastical law. The church can determine things like whell you can fulfil your sunday obligation on saturday evening. Some elements of canon lawr are not merely ecclesiastical. Like you cannot be baptized more than once. S baptism puts an indelible mark on your soul. So if you've been baptized and then you go back in time to before the christian age, you should not get baptized again. Because that indelibles mark