§ That, for the purposes of petroleum revenue tax and supplementary petroleum duty, provision may be made with respect to the valuation of gas—
- (a) of which the largest component, as defined in that provision, is ethane; and
- (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
- (c) which is used for petrochemical purposes.
§ Ordered,