.-(1) Where a scheme is submitted to the Authority under sub-section (1) of section 29, the Authority may, having regard to the matters referred to in section 30, either concur in the scheme without modification or require the Board or, as the case may be, the Generating Company to modify the scheme in such manner as the Authority specifies in the requisition so as to ensure that the scheme conforms to the national power policy evolved by the Authority in pursuance of the provisions contained in clause (i) of sub-section (1) of section 3 and in either case the Authority shall also communicate its decision to the State Government or State Governments concerned:

Provided that where the scheme was submitted for concurrence by a Generating Company in relation to which the Central Government is the [competent Government or one of the competent Governments][, the decision shall be communicated also to that Government.

(2)

Where under sub-section (1) the Authority requires that a scheme may be modified, the Board or, as the case may be, the Generating Company may prepare a revised scheme in accordance with such requisition and submit it to the Authority for concurrence and thereupon the Authority shall, if satisfied that the revised scheme complies with the requisition, concur in the same.