6 In our view, the present application is not competent, and this Court has no jurisdiction to deal with it. The jurisdiction of the Full Court in relation to appeals under the Justices Act is statutory. The statute "defines the grounds, prescribes the procedure and states the duty of the court" in relation to appeals: Grierson v The King [1938] HCA 45; (1938) 60 CLR 431 at 435 per Dixon J. The principles stated in Grierson were applied in this Court in the case of Matta v R (unreported; CCA SCt of WA; Library No 95061; 15 November 1995) in relation to the question of whether repeated applications for an extension of time within which to appeal against conviction could be made, in the case of an indictable offence, where there had been an earlier refusal of an extension of time on the basis that the proposed grounds of appeal lacked merit. In that case, as in this, it was said that the grounds upon which it was proposed to appeal were different, in the second application, from those which had been proposed in the first application. The court considered any difference in the proposed grounds of appeal to be irrelevant; what was relevant was that the statute apparently provided for but one appeal, so that where a determination had been made on an application for extension of time that an appeal lacked merit, it was not competent to bring a further application based upon different grounds.