With respect to chargeable periods ending after 31st December 1982, section 1(2) of the principal Act (rate of petroleum revenue tax) shall be amended by substituting for the words “70 per cent.” the words “ 75 per cent. ”.

At the end of subsection (5) of section 122 of the M1Finance Act 1981 (the chargeable periods for which supplementary petroleum duty is chargeable) for the words “and 30th June 1982” there shall be substituted the words “ 30th June 1982 and 31st December 1982 and to no other periods ”.