01 February 2014
in my view relief should be provided before section 91 adjustment.
Please refer explanation (ii) to section 91:
"the expression "Indian rate of tax" means the rate determined by dividing the amount of Indian income-tax after deduction of any relief due under the provisions of this Act but before deduction of any relief due under this 72[Chapter], by the total income;"
from the above you can infer that all relevant reliefs under income tax act are to be considered before providing for deduction under 91.