The Labour Party Rule Book is the governing document for the Labour Party in the United Kingdom.
The Labour Party Constitution forms the first chapter of the Rule Book and contains the most important principles and provisions for Labour Party governance. The chapter is divided into ten sections named Clause I to Clause X. Clause IV is the best known Aims and values clause, which was significantly changed in 1995 after Tony Blair became leader of the Labour Party.
The rules may be amended by Labour Party conference. The appendices may be amended by the party's National Executive Committee confirmed by the following Labour Party conference.
The Labour Party is an unincorporated association without a separate legal personality, and the rule book legally regulates the organisation and the relationship with members.