(1) A local authority shall for the purposes of these Regulations check by sampling the sulphur content of gas oil which is placed on the market in its area.
(2) The method adopted for determining the sulphur content of gas oil for the purposes of these regulations shall be that defined by ISO method 8754 .
(3) The statistical interpretation of the results of the checks carried out in accordance with paragraph (1) above shall be made in accordance with ISO standard 4259 (1979 edition) .
(4) Section 56 to 58 of the Clean Air Act 1993 (powers of entry etc. ) shall apply for the purposes of this regulation as if it were a provision of Part IV of that Act, and as if, in relation to Northern Ireland, any reference to a local authority were a reference to a district council.
(5) In this regulation, “local authority” means—
(a) in England and Wales, the council of a district or a London borough, the Common Council of the City of London, the Sub-Treasurer of the Inner Temple and the Under Treasurer of the Middle Temple;
(b) in Scotland, an islands or district council;
(c) in Northern Ireland, a district council.