“19. The construction of Section 63, when read with the other provisions of this Act, is what comes up for decision in the present appeals. It may be noticed that Section 63 begins with a non obstante clause, but it is a non obstante clause covering only Section 62. Secondly, unlike Section 62 read with Sections 61 and 64, the appropriate Commission does not “determine” tariff but only “adopts” tariff already determined under Section 63. Thirdly, such “adoption” is only if such tariff has been determined through a transparent process of bidding, and, fourthly, this transparent process of bidding must be in accordance with the guidelines issued by the Central Government. What has been argued before us is that Section 63 is a standalone provision and has to be construed on its own terms, and that, therefore, in the case of transparent bidding nothing can be looked at except the bid itself which must accord with guidelines issued by the Central Government. One thing is immediately clear, that the appropriate Commission does not act as a mere post office under Section 63. It must adopt the tariff which has been determined through a transparent process of bidding, but this can only be done in accordance with the guidelines issued by the Central Government. Guidelines have been issued under this section on 19-1-2005, which guidelines have been amended from time to time. Clause 4, in particular, deals with tariff and the appropriate Commission certainly has the jurisdiction to look into whether the tariff determined through the process of bidding accords with Clause 4.