7. After regulation 12(1) (requirement for an environmental permit) insert—
“(1A) Paragraph (1)(a) does not apply in relation to the operation of a medium combustion plant, mobile medium combustion plant or a specified generator comprising—
(a)a new medium combustion plant, before 20th December 2018;
(b)an existing medium combustion plant with a rated thermal input greater than 5 megawatts, before 1st January 2024;
(c)an existing medium combustion plant with a rated thermal input of less than or equal to 5 megawatts, before 1st January 2029;
(d)a specified generator, before the permitting date,
unless that medium combustion plant, mobile medium combustion plant or specified generator, is required to have a permit by virtue of forming part of another class of regulated facility.
(1B) For the purposes of paragraph (1A)—
(a)“existing medium combustion plant” and “new medium combustion plant” have the meanings given in paragraph 2(1) of Schedule 25A;
(b)“permitting date” has the meaning given in paragraph 3(2) of Schedule 25B.”.