15.—(1) Subject to paragraph (2), limit values and target values apply—
(a)from the date specified for each limit value or target value concerned in Schedules 1 or 2, or
(b)when these Regulations come into force, if no date is specified in those Schedules.
F1(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Textual Amendments
F1Reg. 15(2) omitted (31.12.2020) by virtue of The Air Quality Standards (Wales) (Amendment) (EU Exit) Regulations 2019 (S.I. 2019/390), regs. 1(1), 2(6); 2020 c. 1, Sch. 5 para. 1(1)