7In computing the assessable profit or allowable loss accruing to a participator in a chargeable period from an oil field, the market value of any oil won as mentioned in section 3(1)(f) of this Act—
(a)shall not be taken into account under section 2(4)(b) of this Act if and to the extent that at the end of the preceding chargeable period the oil was in the course of being transported to the place where it was first landed in the United Kingdom ; and
(b)shall not be taken into account under section 2(5)(d) of this Act if and to the extent that at the end of the first-mentioned chargeable period the oil was in the course of being so transported.