Sec. 6. The supreme court may, by rule of court, provide that if:
(1) the Supreme Court of the United States, a circuit court of appeals of the United States, or the court of appeals of the District of Columbia determines that there are involved in any proceeding before the federal appellate court questions or propositions of the laws of Indiana that are determinative of the proceeding; and
(2) there are no clear controlling precedents in the decisions of the supreme court;
the federal appellate court may certify the questions or propositions of the laws of Indiana to the supreme court for instructions concerning the questions or propositions of state law, and the supreme court, by written opinion, may answer.