For the purpose of regulation 2 the basis of deduction is—
(a) the basis used in the company’s latest company tax return to determine the amount of tax expended on behalf of policy holders or annuitants allowed as a deduction in calculating the profits for that accounting period; or
(b) where the company has no latest company tax return—
(i) where the company was the transferee of life assurance business under an insurance business transfer scheme, the basis used in the latest company tax return of the transferor company to determine the amount of tax expended on behalf of policy holders or annuitants allowed as a deduction in calculating the profits for that accounting period; or
(ii) in any other case, the basis the company would have used to determine the amount of tax expended on behalf of policy holders or annuitants allowed as a deduction in calculating the profits for an accounting period had it been required to deliver a company tax return for an accounting period beginning before 1st January 2003.