Several instruments used in single transaction of sale, mortgage or settlement

(1) Where, in the case of any sale, mortgage or settlement, several instruments are employed for completing the transaction, the principal instrument only shall be chargeable with the duty prescribed in the Schedule for the conveyance, mortgage, or settlement, and each of the other instruments shall be chargeable with a duty of Rs. 2 instead of the duty, if any, prescribed for it in the Schedule. (2) The parties may determine for themselves which of the instruments so employed shall, for the purpose of sub section (1), be deemed to be the principal instrument: Provided that the duty chargeable on the instrument so determined shall be the highest duty which would be chargeable in respect of any of the said instruments employed.