The National Capital Region (NCR) and its planning board were created under the National Capital Region Planning Board Act of 1985. That 1985 Act defined the NCR as being the whole of Delhi; the Haryana districts of Gurgaon, Faridabad and Sonipat, Rohtak (then including Jhajjar tehsil) and the Rewari tehsil then in Mahendragarh district; and the Uttar Pradesh districts of Bulandshahr, Muzaffarnagar, Meerut (then including Baghpat tehsil), and Ghaziabad (then including Hapur tehsil), and some part of the Rajasthan district of Alwar. The 1985 boundary of the NCR covered an area of .