(1)An amount of the company's field allowance for the new oil field is to be activated in respect of each reference period.
(2)The amount of the field allowance to be activated is the smallest of the following amounts—
(a)the relevant activation limit,
(b)the company's relevant income from the field in the reference period, and
(c)the unactivated amount of the field allowance which the company holds at the beginning of the reference period.
(3)The relevant activation limit is—
where—
T is the amount of the total field allowance for the field (see section 356),
E is the company's share of the equity in the field during the reference period, and
R is the number of days in the reference period.
(4)The company's relevant income from the field in the reference period is—
where—
I is the company's relevant income from the field in the whole of the accounting period,
R is the number of days in the reference period, and
L is the number of days in the accounting period for which the company is a licensee in the new oil field.