The Supreme Court shall have the following powers:
(2) Review, revise, reverse, modify, or affirm on appeal or certiorari, as the law or the Rules of Court may provide, final judgments and orders of lower courts in:
(a) All cases in which the constitutionality or validity of any treaty, international or executive agreement, law, presidential decree, proclamation, order, instruction, ordinance, or regulation is in question.
(Art. VIII, Sec. 5)