Postal tariff amendment revises postage by prescribing a base rate, incremental weight-based charges, and a fixed letter-card rate. Amendment substitutes the sub-headings Letters and Letter-cards in the First Schedule to the Indian Post Office Act, 1898 with provisions prescribing a base postage rate for letters up to an initial weight and an additional rate for every subsequent weight slab or fraction, and a separate fixed postage rate for letter-cards.