Exchange rate determination fixes legally applicable currency conversion rates for imports and exports effective immediately. The Central Board of Indirect Taxes and Customs prescribes distinct rates of exchange for conversion of specified foreign currencies into Indian rupees for import and export transactions, effective from 5th March, 2021, superseding the earlier notification; Schedule I sets per unit rupee equivalents for listed currencies and Schedule II sets per 100 unit equivalents for certain currencies, making those rates applicable for customs valuation and related statutory purposes.