6. Section 7 of the Principal Act is amended—
(a) by inserting in subsection (1) “ecologically sustainable, healthy,” before “attractive”;
(b) by omitting subsection (2) and substituting the following subsection:
“(2) The Plan shall set out the planning principles and policies for giving effect to its object.”;
(c) by omitting paragraph (3) (c); and
(d) by omitting from paragraph (3) (f) “that Part” and substituting “section 193”.