# The Civil Procedure Rules 1998, Rule 17.1: Amendments to statements of case

Extent: E+W

(1) A party may amend their statement of case , including by removing, adding or substituting a party, at any time before it has been served on any other party.
(2) If his statement of case has been served, a party may amend it only—
(a) with the written consent of all the other parties; or
(b) with the permission of the court.
(3) If a statement of case has been served, an application to amend it by removing, adding or substituting a party must be made in accordance with rule 19.4.
(4) A party who files a notice under Part 38 discontinuing all or part of a claim may amend their statement of case without the court’s permission to give effect to the discontinuance.
...
(Part 22 requires amendments to a statement of case to be verified by a statement of truth unless the court orders otherwise)

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Source: https://www.legislation.gov.uk/uksi/1998/3132/rule/17.1 (the official version)
Page: https://openlegislation.uk/civil-procedure-rules-1998/rule-17.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.