(1) If, under this Act, a function or power is conferred on an entity, the entity must--
(a) unless paragraph (b) or (c) applies--perform the function or exercise the power in a way that advances this Act's purpose; or
(b) if the entity is an assessment manager other than a local government--in assessing and deciding a matter under this Act, have regard to this Act's purpose; or
(c) if the entity is a referral agency other than a local government (unless the local government is acting as a referral agency under devolved or delegated powers)--in assessing and deciding a matter under this Act, have regard to this Act's purpose.
(2) Subsection (1) does not apply to code assessment or compliance assessment under this Act.