Composition levy: option to pay a prescribed percentage of turnover instead of regular tax, subject to strict eligibility and restrictions. Composition levy allows a registered person below a prescribed turnover threshold to pay tax at a prescribed single percentage of turnover in the State instead of regular tax, subject to capped rates, specified eligibility conditions and exclusions, collective opt in where registrations share a common PAN, lapse on exceeding the turnover threshold, prohibition on collecting tax or claiming input tax credit, and liability to tax and penalty with application of the Act's tax determination provisions if the scheme is wrongly availed.