43(1)A person exercising a power conferred by this Part of this Schedule must have regard to—
(a)any relevant guidance issued, before or after the passing of this Act, by the relevant authority, and
(b)any advice given by a public health officer in relation to any particular case.
(2)In sub-paragraph (1) “relevant authority” means—
(a)in relation to the exercise of a power by an immigration officer, the Secretary of State;
(b)in relation to the exercise of a power by a public health officer or constable, the Scottish Ministers.