6. Section 4A of the Principal Act is amended—
(a) by omitting from paragraph (1) (a) “authorize” and “Section” and substituting “authorise” and “Zone”, respectively;
(b) by omitting from paragraph (1) (b) “authorize” and substituting “authorise”;
(c) by omitting subsections (2), (3) and (4); and
(d) by omitting from subsections (6) and (7) “section” (wherever occurring) and substituting “zone”.