4 (1) Every local authority shall take reasonable steps, through the provision of services under Part III of this Act, to prevent children within their area suffering ill-treatment or neglect.
(2) Where a local authority believe that a child who is at any time within their area—
(a) is likely to suffer harm; but
(b) lives or proposes to live in the area of another local authority[F1189 or in the area of a local authority in WalesF1189]
they shall inform that other local authority [F1190or the local authority in Wales, as the case may beF1190] .
(3) When informing that other local authority[F1191 or the local authority in WalesF1191] they shall specify—
(a) the harm that they believe he is likely to suffer; and
(b) (if they can) where the child lives or proposes to live.