India, Dec. 30 -- When GRAP Stage 4 was implemented earlier in Delhi, the government announced two additional curbs. The first made a valid PUC certificate mandatory to buy fuel at petrol pumps in Delhi. This applied to all vehicles, including BS6 models. The second barred the entry of out-of-state registered vehicles that do not meet BS6 emission norms from entering the city.

As air quality improved, GRAP Stage 4 was lifted, and the city moved back to Stage 3. However, the two additional measures announced earlier were reviewed again over the weekend.

Environment Minister, Manjinder Singh Sirsa said the Delhi government has decided to make these two measures permanent. Until further orders, the "no PUC, no fuel" rule will remain in for...