prescribing particular areas, or descriptions of area, (which may include a locality within their own area) in which a local authority may not place asylum-seekers while providing support for them;

prescribing circumstances in which a particular area, or description of area, (which may include a locality within their own area) is to be one in which a local authority may not place asylum-seekers while providing support for them;

as to the circumstances (if any) in which any such provision is not to apply.