HC Deb 16 June 1982 vol 25 c1058

That, for the purposes of petroleum revenue tax and supplementary petroleum duty, provision may be made with respect to the valuation of gas—

  1. (a) of which the largest component, as defined in that provision, is ethane; and
  2. (b) which is, within the meaning of Part I of the Oil Taxation Act 1975, relevantly appropriated or diposed of otherwise than in a sale at arm's length; and
  3. (c) which is used for petrochemical purposes.