New Delhi, Sept. 10 -- The government on Tuesday allowed manufacturers, packers, and importers of pre-packaged goods to revise maximum retail prices (MRP) on unsold stock following changes in Goods and Services Tax (GST) rates, a move aimed at easing the transition for businesses and avoiding packaging waste. At the heart of the order, issued by the Department of Consumer Affairs under the Legal Metrology (Packaged Commodities) Rules, 2011, companies can revise the MRP on goods manufactured, packed, or imported before the GST revision-either upward or downward depending on the tax change. Mint reported on September 6 that the Centre has vowed to guard consumer gains as GST cuts take effect on items ranging from rotis to SUVs. As per that report, the consumer affairs ministry will scan complaints on social media, review representations from consumer groups, and track grievances received on the National Consumer Helpline, the government's central redressal system, according to two people aware of the matter. On September 3, GST rates were largely consolidated into two slabs-5% and 18%. Goods from the old 12% and 28% slabs moved to lower rates, essential items were exempted, and a 40% rate remains for "sin" and luxury goods. The government's decision to revamp GST will lead to sharp tax cuts on a range of daily-use items....