s 84 Duties of Scottish ... local authorities in relation to designated areas.
(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1A) This section applies in relation to a local authority in Scotland .... (2) Where an order under section 83 above comes into operation, the local authority which made the order shall prepare, in accordance with the following provisions of this Part, a written plan (in this Part referred to as an “action plan”) for the exercise by the authority, in pursuit of the achievement of air quality standards and objectives in the designated area, of any powers exercisable by the authority. (3) An action plan shall include a statement of the time or times by or within which the local authority in question proposes to implement each of the proposed measures comprised in the plan. (4) A local authority may from time to time revise an action plan. (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .