New Delhi, Dec 30 (ANI): The Bharatiya Janata Party (BJP) on Tuesday expressed its gladness over delivering on its promise of regularizing unauthorized colonies in New Delhi, adding that the decision will provide relief for many residents in the national capital. The Union Cabinet extended the cut-off date for the regularization of unauthorised colonies in New Delhi from March 31, 2002, to June 1, 2014 on Monday. The rival parties, however, said that the BJP is trying to take political mileage by coming up with this proposal for the poll bound Delhi.