s 10 SCHEDULE 3A Safety Directions
(1) A direction under this Schedule may be varied or revoked by a further direction. (2) If the Secretary of State thinks that a direction under this Schedule is wholly or partly no longer necessary for the purpose for which it was given, he shall vary or revoke the direction as soon as is reasonably practicable. (3) Where the Secretary of State has given a direction to a person under this Schedule he shall consider any representations about varying or revoking the direction which are made to him by that person.