The CAQM has invoked Stage III of the Graded Response Action Plan (GRAP) across Delhi-NCR as a precautionary measure amid worsening air quality, days ahead of Diwali. The restrictions aim to. The move comes as pollution levels continue to worsen across the national capital and neighbouring areas ahead of Diwali, when air quality typically comes under further. GRAP Stage III Curbs Kick In Across Delhi-NCR As Air Quality Worsens Ahead Of.