3. The statistical interpretation of the verification of the sulphur content of the gas oils used shall be carried out in accordance with ISO standard 4259 (1992)(1).
(1)
Described in the British Standard entitled “Petroleum Products – Determination and Application of precision data in relation to methods of test” published under the number BS EN ISO 4259: 1996 and ISO 4259: 1992, which came into effect on 15th February 1996.