"it's been a long standing legal principle inthe UK that those under 18 can consent or decline consent for a procedure as long as those clinically responsible for care are happy that the child understands the issues and is competent to make the decision."
Are you from the USA
if yes do any states over there have any laws which are similar to the english law.
what method of determination do you think is best, the competance baised one or one strictly baised on age?