Income Tax Act, 1961
Sch. I Part C Rule 6. PROFITS AND GAINS OF NON-RESIDENT PERSON.
(1) The profits and gains of the branches in India of a person not resident in India and carrying on any business of insurance, may, in the absence of more reliable data, be deemed to be that proportion of the world income of such person which corresponds to the proportion which his premium income derived from India bears to his total premium income.
(2) For the purposes of this rule, the world income in relation to life insurance business of a person not resident in India shall be computed in the manner laid down in this Act for the computation of the profits and gains of life insurance business carried on in India.