A direction given to a strategic planning authority under this Part may—
require the authority to do specified things by specified dates;
require the authority to keep the Secretary of State informed at specified intervals of the progress being made towards doing what the authority is directed to do.
A direction under this Part must be given in writing.
A direction under this Part may be varied or revoked by notice in writing to the strategic planning authority to which it was given.
A direction under this Part must be published.