Which makes me wonder about the kids I use to see get baptised at eight and nine years of age. No doubt they are given their blood cards right away after their baptisims so therefore it's official. The refusal of blood will look more "legal" to those on the outside meaning a tiny bit less headaches for the society's lawyers if something were to happen to the child. It would also keep them walking a straight line with their school mates. Get them talking at the doors sooner. A protective snare.
I wonder how that would work if a child is unconscience and needed a blood transfusion, and if the parents were the childs living power of attorney and they said no to the blood transfusion, could a doctor go over the parents authority? If it were an adult there would be no questions as to their request of how they would want to be medically treated. Would the blood card be enough with the childs request on it along with his signature?