(1) The over-drawal/under-drawal of electricity by any buyer during the time block shall not exceed 12% of its scheduled drawal, when grid frequency is 1 [49.85Hz] and above” but “below 50.05 Hz”:
Provided that no over-drawal of electricity by any buyer shall be permissible when grid frequency is “below 1[49.85Hz]” and no under-drawal of electricity by any buyer shall be permissible when grid frequency is “50.05 Hz and above”.
(2) The under-injection/over-injection of electricity by a seller during a time-block shall not exceed 12% of the scheduled injection of such seller, when frequency is 1 [49.85Hz] and above but below 50.05 Hz”:
Provided that no under injection of electricity by a seller shall be permissible when grid frequency is "below 1[49.85Hz]" and no over injection of electricity by a seller shall be permissible when grid frequency is "50.05 Hz and above”:
Provided further that any injection of infirm power by a generating station prior to COD of a unit during testing and commissioning activities shall be exempted from the volume limit specified above for a period not exceeding 6 months or the extended time allowed by the Commission:
Provided further that any drawal of power by a generating station prior to COD of a unit for the start up activities shall be exempted from the volume limit specified above when grid frequency is “[49.85Hz] and above".