GST rate notification amendments revise Assam schedule entries, mixed supply valuation, and taxable goods classifications with retrospective effect. Amends the Assam GST rate notification by revising Schedule I, II, III and IV entries through omissions, renumbering, substitutions and fresh insertions for specified goods such as marble and travertine, natural cork products, flexible intermediate bulk containers, retreaded tyres, lithium-ion accumulators, video game consoles, and vehicle parts. It also inserts an explanation for mixed supplies, deeming seventy per cent of the gross consideration as the value of goods and the balance as the value of the taxable service, and operates from 1 January 2019.