(1) The development fee is payable to the industry body.
(2) Every person to whom regulation 15(3) applies must supply to the industry body a return as at a date that is as soon as practicable after the commencement date and no later than 38 days after the commencement date (the deadline for supplying returns). The return must state—
(a) the total number of gigajoules of gas that the person purchased directly from all gas producers during the 12 months prior to the month in which the deadline for supplying returns occurred; and
(b) how many gigajoules of gas were purchased from each gas producer during that 12-month period.
(3) As soon as practicable after the deadline for supplying returns, the industry body must determine and publish a breakdown of the estimated critical contingency development costs.
(4) As soon as practicable after the deadline for supplying returns, the industry body must invoice every person to whom regulation 15(3) applies for that person’s share of the estimated critical contingency development costs calculated in accordance with the following formula:
| a × | b | |||
| c |
where—
(5) As soon as practicable after the go-live date, the industry body must determine and publish on its Internet site the actual critical contingency development costs.
(6) No less than 10 business days after publication of the actual critical contingency development costs, the industry body must invoice or issue a credit note to every person to whom regulation 15(3) applies with the difference between—
(a) that person’s share of the actual critical contingency development costs calculated in accordance with the formula in subclause (4), with the necessary modifications; and
(b) the amount of the estimated critical contingency developments costs invoiced to that person.