13   Late applications for leave to appeal

(1)  An appeal to the District Court may be made:

(a)  by any person by whom an appeal could be made under section 11, but for section 11 (2), and

(a1)  by any defendant by whom an appeal could be made under section 11A, but for section 11A (2), and

(b)  by any person by whom an application for leave to appeal could be made under section 12, but for section 12 (3),

      but only by leave of the District Court.

(2)  An application for leave to appeal must be made within 3 months after the relevant conviction or sentence is made or imposed, or the relevant application under section 4 is refused, as the case may require.