(1) The Commonwealth or a Commonwealth agency must not:
(a) contravene a plan made under section 324S; or
(b) authorise another person to do, or omit to do, anything that, if it were done or omitted to be done by the Commonwealth or the Commonwealth agency (as appropriate), would contravene such a plan.
(2) If there is no plan in force under section 324S for a particular National Heritage place described in subsection (1) of that section, the Commonwealth and each Commonwealth agency must take all reasonable steps to ensure that its acts (if any) relating to the place are not inconsistent with the National Heritage management principles.