Minors are never competent. That is why we call them minors.
Except for the abortion carve-out, set in place by the Florida Supreme Court. Minors may not be required to obtain parental or judicial consent for an abortion. Minors may not be required to even inform a parent, and law may not require a doctor to inform a parent.
http://www.floridasupremecourt.org/decisions/pre2004/ops/sc01-843.pdf