Where at any Time heretofore any Duties or Powers have, by any Act of Parliament or otherwise, been imposed upon or given to any Officer of the said Duchy, and such Changes have taken or shall take place in the Functions of such Officer or otherwise as shall render it expedient that such Duties or Powers shall be imposed upon or given to some other Officer of the said Duchy, then and in every or any such Case it shall be lawful for His said Royal Highness to appoint any Officer of the said Duchy to fulfil the Duties and exercise the Powers so imposed upon or given to any other Officer of the said Duchy as aforesaid; and all such Duties and Powers shall and may be fulfilled and executed by the Officer so appointed as aforesaid, in his own Name or otherwise, as effectually, to all Intents and Purposes, and in the same Manner, as the same may or might be fulfilled or executed by the Officer originally named or appointed for the Purpose thereof; and every such Appointment as last aforesaid may be made either for One Case or for any Class of Cases, or for all Cases generally, and either as to all of the Duties or Powers of any Officer, or for some exclusively of the other of such Duties or Powers.