60. (i) The several high courts are courts of record and have such jurisdiction, original and appellate, including admiralty jurisdiction in respect of offences committed on the high seas, and-all such powers and authority over or in relation to the administration of justice, including power to appoint clerks and other ministerial officers of the court, and power to make rules for regulating the practice of the court, as are vested in them by letters patent, and subject to the provisions of any such letters patent, all such jurisdiction, powers and authority as are vested in those courts respectively at the commencement of this Act.
(ii) The letters patent establishing, or vesting jurisdiction, power, or authority, in a high court may be amended from time to time by a further letters patent.