GST on coke and semi coke of coal establishes new tax treatment under cited notification effective from notified date. GST is made applicable to coke and semi coke of coal, of lignite or of peat as listed in Schedule I, including agglomerated and non-agglomerated forms and retort carbon, pursuant to the cited notification which prescribes the operative commencement date and integrates these goods into the Schedule I tariff for indirect taxation.