The binding legal principle is that: (1) An order is final and definitive if it has the effect of finally determining the issue or cause of action between the parties such that it is not subject to any subsequent confirmation or discharge; the test focuses on the nature and effect of the order, not its form. (2) An order dismissing an application for leave to execute is interlocutory in nature because it does not dispose of any issue or portion of the issue in the main suit and does not finally determine the cause of action between the parties. (3) Section 43(2)(d) of the High Court Act mandates that no appeal shall lie from an interlocutory order without leave of the court a quo or, if refused, leave of a Supreme Court judge. (4) Where an appellant fails to obtain the requisite leave to appeal from an interlocutory order, the appeal is not properly before the Court and must be struck off the roll.