The Lord Chancellor may by regulations provide for the separate representation of children in proceedings in England and Wales which relate to any matter in respect of which a question has arisen, or may arise, under—
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part IV;
the 1973 Act; . . .
the Domestic Proceedings and Magistrates' Courts Act 1978 or
Schedule 5 or 6 to the Civil Partnership Act 2004.
The regulations may provide for such representation only in specified circumstances.