6(1)The Secretary of State shall issue codes of practice about the exercise by officers of functions conferred on them by virtue of this Act.
(2)The failure by an officer to observe a provision of a code shall not of itself make him liable to criminal or civil proceedings.
(3)A code—
(a)shall be admissible in evidence in criminal and civil proceedings, and
(b)shall be taken into account by a court or tribunal in any case in which it appears to the court or tribunal to be relevant.
(4)The Secretary of State may revise a code and issue the revised code.