4. For the purposes of regulation 4(1) of the 2013 Regulations—
(a)the Youth Justice Board for England and Wales may continue to issue invoices up until the end of 17th December 2018; and
(b)where an invoice is issued by both the Youth Justice Board for England and Wales and the Secretary of State, the designated authority is liable to pay an applicable amount once, to either of the Youth Justice Board for England and Wales or the Secretary of State.