13For section 9 substitute—
The Secretary of State may, if at any time it appears to him to be necessary so to do, give directions to any local authority to which subsection (1) of section 6 of this Act applies requiring them to provide, pursuant to that section, such sites or additional sites, for the accommodation of such numbers of caravans, as may be specified in the directions; and any such directions shall be enforceable, on the application of the Secretary of State, by mandamus.”.