A single Justice of the Court of Appeal may exercise a power vested in the Court of Appeal, not involving the decision of a cause or matter before the Court of Appeal, except that-

(a) in criminal matters, where that Justice refuses or grants an application in the exercise of any such power, a person affected by it is entitled to have the application determined by the Court of Appeal as duly constituted; and

(b) in civil matters, any order, direction or decision made or given in exercise of the powers conferred by this article, may be varied, discharged or reversed by the Court of Appeal as duly constituted.