Subject to the provisions of Part V, the High Court shall, in accordance with section 19(2), have the following probate jurisdiction, that is to say all such jurisdiction in relation to probates and letters of administration as it had immediately before the commencement of this Act, and in particular all such contentious and non-contentious jurisdiction as it then had in relation to—
testamentary causes or matters;
the grant, amendment or revocation of probates and letters of administration; and
the real and personal estate of deceased persons.
Subject to the provisions of Part V, the High Court shall, in the exercise of its probate jurisdiction, perform all such duties with respect to the estates of deceased persons as fell to be performed by it immediately before the commencement of this Act.