9.—(1) The revenue collection counterparty must determine—
(a)the total amount of reserve payments (“the total reserve amount”) to be collected from suppliers in respect of each quarterly obligation period, calculated in accordance with paragraph (6); and
(b)the amount of each electricity supplier’s reserve payment in respect of each quarterly obligation period, calculated in accordance with regulation 10.
(2) The revenue collection counterparty must make and publish its determination of the total reserve amount for a quarterly obligation period before the relevant day.
(3) The revenue collection counterparty must determine the amount of each electricity supplier’s reserve payment for a quarterly obligation period before the end of the period of 8 working days beginning with the relevant day.
(4) The revenue collection counterparty must issue to every relevant supplier a notice which sets out the amount of that supplier’s reserve payment for a quarterly obligation period before the end of the period of 8 working days beginning with the relevant day.
(5) For the purpose of paragraph (4), a “relevant supplier” is an electricity supplier who supplied electricity during the reference period (within the meaning given by regulation 10(4)).
(6) The total reserve amount for a quarterly obligation period is the amount which the revenue collection counterparty determines it would need to be paid for there to be a 19 in 20 probability of it being able to make all the payments it is required to make to RCC parties during the reserve period which commences during that quarterly obligation period having regard to—
(a)the revenue collection counterparty’s estimate of the payments it expects to receive from the RCC parties during that reserve period;
(b)the revenue collection counterparty’s estimate of the payments it will be required to make to RCC parties and electricity suppliers during that reserve period;
(c)the likelihood of any supplier failing to make payments it is required to make under these Regulations during that reserve period; and
(d)any SoS funds that the Secretary of State has specified will be available in respect of that reserve period and that the Secretary of State has specified should be taken into account when adjusting the total reserve amount.
(7) In this regulation the “relevant day” means the day which is 30 days before the beginning of the relevant quarterly obligation period.