The United States may design a tariff architecture that will give India preferential market access vis-à-vis its key competitors under a bilateral trade deal (BTA) in the works. “There is a requirement that any deal has to give you certain kind of preferential access on each other’s part. From the Indian side, because we are operating on MFN (most favoured nation) tariffs, it is easier to do so. From their (US) side, they are operating on executive tariffs. So they are building an architecture which will create those differentials and create a preferential market access,” Commerce Secretary Rajesh Agrawal said Wednesday.