http://www.legislation.gov.uk/uksi/1990/224/contents/made
The Electricity Act 1989 (Nominated Companies) (England and Wales) Order 1990
Electricity supply
King's Printer of Acts of Parliament
2016-04-27
ELECTRICITY
Sections 65(1) and 66(5) of the Electricity Act 1989 provide that, on the transfer date (being a day appointed by the Secretary of State by order under section 65(1) of the 1989 Act), all the property, rights and liabilities of the Electricity Boards in England and Wales and the Electricity Council (subject in the case of the Electricity Council to the exceptions specified in section 66(2) and (6) of the 1989 Act) shall become by virtue of the provision in question property, rights and liabilities of successor companies nominated for the purpose by the Secretary of State.