In this section, "the appropriate authority" means—
The appropriate authority may conduct or make, or cause to be conducted or made,—
If it appears to the appropriate authority—
the appropriate authority may give directions to the local authority requiring it to take such steps as may be specified in the directions.
Without prejudice to the generality of subsection (3) above, directions under that subsection may, in particular, require a local authority—
The powers of the Mayor of London to give directions under this section to a local authority in Greater London may only be exercised after consultation with the local authority concerned.
In exercising any function under subsection (2), (3) or (4) above or (5A) below the Mayor of London shall have regard to any guidance issued by the Secretary of State to local authorities under section 88(1) below.
The Secretary of State shall also have power to give directions to local authorities , other than local authorities in Greater London, requiring them to take such steps specified in the directions as he considers appropriate ...—
so far as relating to the quality of air.
The Mayor of London shall also have the same power to give directions to local authorities in Greater London as the Secretary of State has under subsection (5) above in relation to other local authorities.
Any direction given under this section shall be published in such manner as the body or person giving it considers appropriate for the purpose of bringing the matters to which it relates to the attention of persons likely to be affected by them; and—
of the giving of the direction and of where a copy of the direction may be obtained.
The Mayor of London shall send a copy of any direction he gives under this section to the Secretary of State.
It is the duty of a local authority to comply with any direction given to it under or by virtue of this Part.