http://www.legislation.gov.uk/uksi/2003/971/contents/made
The European Parliamentary Election Petition (Amendment) Rules 2003
General elections
King's Printer of Acts of Parliament
2011-07-04
REPRESENTATION OF THE PEOPLE
SUPREME COURT OF ENGLAND AND WALES
These Rules make it clear that periods of time prescribed by the European Parliamentary Election Petition Rules 1979 may be varied by the court or by the parties unless they are governed by section 119 of the Representation of the People Act 1983.
The European Parliamentary Election Petition (Amendment) Rules 2003
The European Parliamentary Elections Etc. (Repeal, Revocation, Amendment and Saving Provisions) (United Kingdom and Gibraltar) (EU Exit) Regulations 2018