3(1)In section 27 of that Act as amended by the [S.I. 1966/1143.] Alkali, &c. Works Order 1966, in the definition of " noxious or offensive gas " the words " except that arising solely from the combustion of coal ", in both places where they occur, shall be omitted and for the words " Sulphurous anhydride " there shall be substituted the words " Sulphur dioxide ".
(2)The amendments made by the preceding sub-paragraph may be varied or revoked as if they were contained in the said Order of 1966.