58.—(1) The Secretary of State must publish a statement in accordance with this regulation (“an expenditure forecast statement”).
(2) The expenditure forecast statement must be published by 1st March, 1st June, 1st September and 1st December in each year.
(3) For that purpose the Secretary of State must determine, as at the assessment date immediately preceding the date on which the expenditure forecast is to be published (“the latest assessment date”)—
(a)the forecast for total expenditure;
(b)for each tariff category the forecast for expenditure in relation to the relevant installations that fall within that tariff category;
(c)the forecast for expenditure in relation to relevant producers;
(d)in relation to each of the forecasts for expenditure referred to in sub-paragraphs (b) and (c) the increase in expenditure forecast for that tariff category, that is to say the difference between—
(i)the forecast for expenditure as at the latest assessment date; and
(ii)the forecast for expenditure as at the assessment date three months before the latest assessment date.
(4) An expenditure forecast statement must set out, as at the latest assessment date—
(a)the forecast for total expenditure;
(b)each of the forecasts for expenditure referred to in paragraph (3)(b) and (c); and
(c)each of the increase in expenditure forecasts referred to in paragraph (3)(d).
(5) If, as a result of a forecast referred to in paragraph (3), and by virtue of regulation 60(1), the new initial tariff will be different from the former initial tariff, the Secretary of State must publish, with the expenditure forecast statement, a notice (a “tariff change notice”) setting out the new initial tariff and the date on which it will take effect.
(6) For the purposes of paragraph (5)—
(a)“new initial tariff” means the initial tariff for an accredited RHI installation, or biomethane produced for injection, having a tariff start date which falls within the next tariff period;
(b)“former initial tariff” means the initial tariff that would have been applicable to the installation or biomethane produced for injection if the tariff start date had fallen on the day immediately preceding the commencement of that tariff period.