6. (1) There shall be imposed by the Commission on the Board a requirement that the Board take such steps and make such arrangements as may be necessary to have available to it and purchase electricity generated pursuant to the contracts listed in Part 3 of Schedule 1 for the respective terms of those contracts.

F28[(1A) There shall be imposed by the Commission on the Board a requirement that the Board take such steps and make such arrangements as may be necessary to have available to it and purchase electricity generated pursuant to the PPAs listed in Schedule 1A for the respective terms of those contracts.]

F29[(1B) There shall be imposed by the Commission on the Board a requirement that the Board take such steps and make such arrangements as may be necessary to have available to it and purchase electricity generated pursuant to the PPAs listed in Schedule 1B for the respective terms of those contracts.]

(2) The obligation referred to in paragraph (1) shall not in any event continue beyond 31 December 2014.

F28[(3) The period of the obligation referred to in paragraph (1A) as respects an individual generating station shall determine:

(a) on 31 December 2018,

(b) on the date nominated by a third party producer to the Board as the date upon which the generating station concerned specified in Schedule 1A will cease to supply electricity to the Board in accordance with the terms of the PPA concerned, or

(c) on the date which is 15 years from the date of commercial operation of the generating station concerned,

whichever first occurs.]

F28[(4) The obligation on the Board to have available to it and purchase, as appropriate, the electricity generated by the stations specified in Schedule 1A shall not require the Board to have available to it, or purchase, as appropriate, such electricity from any individual station -

(a) where the station is not generating electricity for supply to the Board, or

(b) after the date nominated by a third party producer to the Board as the date upon which a station specified in Schedule 1A will cease to supply electricity to the Board in accordance with the terms of the PPA.]

F30[(5) The period of the obligation referred to in paragraph (1B) shall—

(a)  as respects an individual generating station specified in Part 1 of Schedule 1B determine—

(i)  on 31 December 2019, or

(ii)  on the date which is 15 years from the date of commercial operation of the generating station concerned,

whichever first occurs,

(b)  as respects and individual generating station specified in Part 2 of Schedule 1B, determine—

(i)  on 31 December 2021, or

(ii)  on the date which is 15 years from the date of commercial operation of the generating station concerned,

whichever first occurs,

and

(c)  as respects an individual generating station specified in Part 3 of Schedule 1B determine—

(i)  on 31 December 2016, or

(ii)  on the date which is 10 years from the date of commercial operation of the generating station concerned,

whichever first occurs.]

F29[(6) The obligation on the Board to have available to it, and purchase, as appropriate, the electricity generated by the stations specified in Schedule 1B shall not require the Board to have available to it, or purchase, as appropriate, such electricity from any individual station where the station is not generating electricity for supply to the Board.]

F29[(7) Notwithstanding Article 6(5), where a contract is specified in Schedule 1A and Schedule 1B which relates to the same generating station, the obligation of the Board shall determine on the date which is 15 years from the date of first commercial operation of the generating station concerned.]