If a child has been certified as required by Article 1555, the child's parent or his guardian may make a declaration to document the decision concerning the withholding or withdrawal of medical treatment or life-sustaining procedures on the child's behalf, except where either:
(1) The parent or guardian has actual notice of contrary indications by the affected child.
(2) The parent or guardian has actual notice of opposition to the decision by the other parent or by the child's guardian.
Acts 1991, No. 235, §15, eff. Jan. 1, 1992.