( 1 ) THIS Judgment will dispose of both the writ petitions as they raise common questions. The petitioner in W. P. 9707 of 90 is A. P. Lingadhari Koya (Ordinary) association, represented by its Convenor Vibhuti Ramaiah. It was filed as a public interest litigation questioning the legality of an order issued by the government of Andhra Pradesh in Memo No. ll29 / Sl / 89-l, dated 23-4-90 by which the Government directed that"every case in which a claim for issue of a Scheduled Tribe Community certificate on the basis of the applicant s caste as belonging to Lingadhari koya (ordinary) should be referred to Director, Tribal Cultural Research and Training Institute for clearance before issue of Scheduled Tribe community certificate. "the memorandum also directed all authorised officers to refer all such cases to the Director, Tribal Cultural Research and Training Institute (for short Director, tribal) before issue of certificates and all educational institutions in the State were required to insist on clearance from the Director, Tribal, before accepting the certificate submitted by any one as belonging to Lingadhari Koya (ordinary) tribe.

( 2 ) W. P. NO. 13992 of 91 was