Subject to this Act, in considering an application or proposal:
(a) the Authority is not bound to act in a formal manner; and
(b) the Authority is not bound by the rules of evidence; and
(c) the Authority may inform itself on any matter in such manner as it thinks fit; and
(d) the Authority may receive written or oral information or submissions; and
(e) the Authority may consult with such persons as it thinks fit.