s 9 Section 198
(1) For subsection (1) of section 198 (replacement of business assets used in connection with oil fields) substitute— (“) If at the time of accrual the relevant asset (or, as the case may be, the property mentioned in section 179(3)(b)) was used by company A for the purposes of a ring fence trade carried on by it, section 152 or 153 shall not apply unless the new assets are on acquisition taken into use, and used only, for the purposes of that trade. ". (2) In subsection (3) of that section (new asset conclusively presumed to be depreciating asset), for “in relation to any of the consideration on a material disposal" substitute “in a case falling within subsection (1) above". (3) In subsection (5) of that section (definitions), omit paragraph (a).