20—(1) This Act, and regulations and orders under it, bind the Crown to the full extent authorised or permitted by the constitutional laws of Northern Ireland, and apply in relation to Crown land as they apply in relation to other land.
(2) No contravention by the Crown of a provision of this Act, or of regulations or an order under this Act, makes the Crown criminally liable; but the High Court may, on the application of the Department, the Food Standards Agency or a district council, declare unlawful an act or omission of the Crown which constitutes such a contravention.
(3) Despite subsection (2), this Act, and regulations and orders under it, apply to persons in the public service of the Crown as they apply to other persons.
(4) “Crown land” means land an estate in which—
(a)belongs to Her Majesty in right of the Crown, or
(b)belongs to a Northern Ireland department or a department of the government of the United Kingdom or is held in trust for Her Majesty for the purposes of any such department.