(1)A policy statement issued under section 17(2) must set out—
(a)how the relevant authority proposes that functions should be exercised differently from the course set out in the statutory guidance, and
(b)the authority's reasons for proposing that different course.
(2)An authority that has issued a policy statement may—
(a)issue a revised policy statement;
(b)give notice revoking a policy statement.
(3)A policy statement (or revised statement) must state—
(a)that it is issued under section 17(2), and
(b)the date on which it is to take effect.
(4)The authority that issues a policy statement (or revised statement), or gives a notice under subsection (2)(b), must—
(a)arrange for a statement or notice to be published;
(b)send a copy of any statement or notice to the Welsh Ministers.