(1) Any reference to North East, or to the undertaking of North East, in any local statutory provision and in any charges scheme made by North East under section 76 of the Water Act 1989 or section 143 of the Water Industry Act 1991 shall have effect, subject to paragraph (2), as a reference to Northumbrian or, as the case may be, to the undertaking of Northumbrian.
(2) Paragraph (1) shall only apply to any local statutory provision or charges scheme in relation to the area, things or persons in relation to which or whom that provision or scheme has effect before 1st April 1996.