DDA — illegal possession

Address: New Delhi, Delhi

There is a DDA market in Paschim Vihar Extension, which is under the possession of 2 persons particularly. there is restaurant (cum bar) running in DDA market and 2nd is Chaudhary tent house, he has possession over most area of DDA market, since about 15 years (which i have seen). Tent house is also taking outside area now. There supposed be many shops in market, which is not there. Does DDA allows 1 or 2 persons to have possession of the shops in the DDA market? DDA allows a Restaurant to run in the Market area?