(1)In subsection (1) of section 6 of the [1979 c. 5.] Hydrocarbon Oil Duties Act 1979 (rates of duty on hydrocarbon oil) for the words "£0 1382 a litre" (light oil) there shall be substituted the words " £0.1554 a litre " and for the words "£0.1191 a litre" (heavy oil) there shall be substituted the words " £0.1325 a litre ".
(2)In Schedule 1 to that Act (vehicles which are not road vehicles within the meaning of that Act) in sub-paragraph (a) of paragraph 2 (exclusions by reference to exemptions from duty under the [1971 c. 10.] Vehicles (Excise) Act 1971) for the word " or " there shall be substituted the words " section 4(1 )(i) of that Act (gritting vehicles) " and at the end of that sub-paragraph there shall be added the words " or section 7(3) of that Act (snow ploughs etc.) ".
(3)Subsection (1) above shall be deemed to have come into force at 6 o'clock in the evening of 9th March 1982.