What is banned & allowed as GRAP-2 anti-pollution measures imposed in Delhi?

Delhi Traffic Police said Delhi-registered petrol/diesel cars meeting BS-IV or higher standards and carrying valid PUC certificates are allowed to ply after imposition of GRAP-2 curbs in the city. Petrol/diesel cars registered outside Delhi that meet BS-IV or lower standards are banned. Emergency services and EV/CNG vehicles are allowed, while BS-IV and older intra-city/intercity buses are barred.