( 1 ) THIS Writ Petition has been filed in public interest by five persons challenging the validity of G. O. Ms. No. 419, Municipal administration and Urban Development (ML) Department, dated 30-6-1998 (sic. 30-7-1998 ). By this G. O. the Government laid down a scheme under which unauthorized constructions made till 30th june, 1998 (sic. 30th July, 1998) could be regularized. The petitioners claim to be persons to whom the environment was dear. The petitioner No. 1 is a retired Reader in Political Science from Zakir Hussain college, New Delhi. She is a member of the society for Preservation of Environment and Quality of Life (hereinafter referred to as speql ). She is also a life member of indian National Trust for Art and Cultural heritage (hereinafter referred to as intach ). She is also member of the Society to save Rocks, Hyderabad. The second petitioner is a retired officer of Indian administrative Service. He retired prematurely while he was working as Vice- chairman of Hyderabad Urban development Authority. He is also a member of SPEQL and INTACH. He is president of Shanti Foundation which is dedicated to the propagation of Gandhian philosophy. He is also