Clean Air Act 1956

21 Exemption for purposes of investigations and research

(1) If the local authority are satisfied, on the application of any person interested, that it is expedient so to do for the purpose of enabling investigations or research relevant to the problem of the pollution of the air to be carried out without rendering the applicant liable to proceedings brought under or by virtue of any of the provisions of this Act, the local authority may by notice in writing given to the applicant exempt, wholly or to a limited extent.—

(a) any chimney from the operation of sections one, five, eleven, sixteen and nineteen of this Act;

(b) any furnace, boiler or industrial plant from the operation of subsection (1) of section three of this Act;

(c) any furnace or oven from the operation of sections six and seven of this Act,

in each case subject to such conditions, if any, and for such period as may be specified in the notice.

(2) Any person who has applied to the local authority for an exemption under this section may, if he is dissatisfied with the decision of the authority on the application, appeal to the Minister and the Minister may, if he thinks fit, by notice in writing given to the applicant and the local authority, give any exemption which the authority might have given or vary the terms of any exemption which they have given.