6.—(1) The amount of electricity referred to in article 3(1)(a), in respect of an obligation period, is such amount of electricity as equals the relevant percentage of all the electricity supplied by the designated electricity supplier to customers in Scotland during the obligation period (as determined pursuant to paragraph (3)), such amount being rounded to the nearest whole megawatt hour (any exact half megawatt hour being rounded upwards).
(2) In paragraph (1) “the relevant percentage” means, in respect of an obligation period, the percentage set out in the second column of Schedule 1 against the reference to that obligation period in the first column of Schedule 1.
(3) For the purposes of paragraph (1) the amount of the electricity supplied by the designated electricity supplier to customers in Scotland during an obligation period is to be determined by taking the aggregate of the estimated figures for its total sales of electricity to customers in Scotland for each of the twelve periods of approximately one month falling wholly or mainly within the obligation period as reflected in the statistics contained in Table 5.5 of “Energy Trends” as that table appears on the Department of Trade and Industry’s website on the 1st August following the end of the obligation period.
(4) Where Table 5.5 of “Energy Trends” is not available in respect of any period the reference in paragraph (3) to Table 5.5 shall be taken to be to such table as is published by the Department of Trade and Industry in substitution for Table 5.5.
(5) Each designated electricity supplier shall furnish to the Department of Trade and Industry the estimated figures relating to its total sales of electricity to customers in Scotland during an obligation period for incorporation in the statistics referred to in paragraph (3) by no later than the 20th June following the end of the obligation period and this obligation shall be independent of any obligation to furnish those figures which arises otherwise than under this Order.
(6) Each designated electricity supplier shall before 7th August in each year inform the Authority of the amount in megawatt hours of its renewables obligation in respect of the last obligation period which ended before the 7th August in question and the amount of all electricity supplied by that designated electricity supplier to customers in Scotland during that obligation period (as determined pursuant to paragraph (3)).