In section 47(2) of the Principal Act—
(a) in paragraph (a) omit "and";
(b) in paragraph (b), for "circumstances." substitute "circumstances;";
(c) after paragraph (b) insert —
"(c) confer a discretionary authority or impose a duty on a specified person or body or class of persons or bodies;
(d) leave any matter or thing to be from time to time determined, applied, dispensed with or regulated by a specified person;
(e) provide in a specified case or class of cases for the exemption of persons or things or a class of persons or things from any of the provisions of the regulations whether unconditionally or on specified conditions and either wholly or to any extent that is specified.".