(1)The Secretary of State may direct that the provisions of this Part relating to slum clearance subsidy apply to a local housing authority subject to modifications.
(2)The modifications may not increase the sums payable to the authority by way of slum clearance subsidy.
(3)A direction may be a general direction or a direction for a particular case, and may be given for a period or subject to conditions.
(4)The modifications, and where applicable the period for which the direction is given and any conditions subject to which it is given, shall be specified in the direction.
(5)A direction may be revoked by the Secretary of State or varied by a further direction.