The Lord Chancellor may, subject to the express provisions of this and of any other Act, make rules for regulating the practice and procedure of examining justices on or in relation to proceedings for indictable offences, and with respect to the forms to be used in connection with any such proceedings, and generally for carrying into effect the enactments relating to such proceedings, and provision may be made by such rules for revoking or amending any forms which are directed or authorised by any statute to be used in connection with any such proceedings, and for substituting new forms for any of such forms.