1. In this batch of 119 Original Petitions, the challenge is against the Government Order, G. O. (MS) 127/84/Pw. F & P. dated 12-11-1984 revising the fees and other charges leviable in the matter of registration and renewal of contractors and also conditions governing the same. O.P. No.279 of 1986 was treated as the main case and Mr. V.M, Kurian, Advocate for the petitioners therein, submitted the leading arguments in these batch of cases. The counsel, who appeared in the other cases, substantially adopted the same arguments. Separate arguments advanced by other counsel are also dealt with herein. Since the attack in all the Original Petitions is against the Government Order aforesaid, and the legal arguments advanced were general in nature, it is not necessary to highlight the individual facts in the various Original Petitions. We will take up the facts in O. P. No. 279 of 1986. There are 17 petitioners in this O. P. They are registered (Government) P.W.D. Contractors in category "A". It is stated that the Government have framed rules for registration of contractors and conditions governing registration. Only registered contractors are entitled to submit tenders for co