In rugby league football, the Laws of the Game are the rules governing how the sport is played. The Laws are the responsibility of the Rugby League International Federation, and cover the play, officiating, equipment and procedures of the game.
 The Laws have undergone significant changes since pioneers of the sport broke away from the Rugby football establishment in 1895. The sport has been described as a "constantly evolving animal, particularly with professional coaches, [with which] the rules have to keep pace".
 The current Laws of the Game and Notes on the Laws are set out in 17 sections:
 The current 17 sections, which include notes, are detailed in fewer than 50 pages and around 17,000 words. The Laws therefore have some flexibility to enable decisions to be made without the need to amend them. For example, Section 15, Law 1 (i) considers behaviour "in any way contrary to the true spirit of the game" to be misconduct. That law has been used to prevent chicken-wing tackling techniques, for example.
 The rules of football as played at Rugby School in the 19th century were decided regularly and informally by the pupils. For many years the rules were unwritten. In 1845 three pupils at the school, William Delafield Arnold, Walter Waddington Shirley and Frederick Leigh Hutchins were tasked with writing a codified set of rules by the then Head Schoolboy and football captain Isaac Gregory Smith. The three pupils submitted 37 rules which were approved on 28 August 1845. Another pupil, Charles Harcourt Chambers, illustrated the Rules.
 The Rules played at the school continued to develop over time and as pupils left they took with them the game as they had played it. In 1871, the Rugby Football Union (RFU) was founded with the purpose of standardising the rules for the clubs playing the Rugby style of football in England. The RFU invited three former pupils, all lawyers, to write the standardised rules, and they titled their work as laws. In June of that year the first Laws of the Game were approved.
 Unions were formed to govern the game in other countries but the English RFU continued to control the Laws until 1885. In 1884, there had been a dispute over the rules between the English and Scottish unions after a match between the two countries; this led to the formation of the International Rugby Football Board in 1886 with the intention of settling such disputes. The RFU refused to join and in 1887 the members of the new organisation, Ireland, Scotland and Wales, stated that no matches would be played against England until the RFU joined and accepted its rules. In 1890 the RFU joined and in 1892 a significant revision of the laws took place.
 From 1895, the year of the schism in the game, the laws of rugby league were initially referred to as "Northern Union" rules, after the new governing body, and were a slight variation on the rules of rugby football as played at that time. What began as modifications to make the competition more entertaining to spectators continued until a distinct sport had emerged.
 Initially the rules were decided by the Northern Rugby Football Union, today's Rugby Football League, the governing body for rugby league in the United Kingdom. As the sport spread to around the world, other rugby leagues were established, notably in Australia, France and New Zealand, a more international approach was adopted. In 1948, the International Rugby League Board (IRLB) was formed. Initially the RFL retained this responsibility for the Laws while it was seen how the new Board would develop. The IRLB was invested with responsibility for the Laws later.
 During the Super League war, a dispute over media rights and the control of the game originating in Australia, the laws of rugby league were altered by the rival factions, the IRLB and its only remaining member, the Australian Rugby League, and the Super League International Board and its members.
 Since 1998 when the different sides reunited, the Laws have been the responsibility of the Rugby League International Federation.
 
 The Northern Rugby Football Union inherited the existing laws of rugby football, as played until that time by its member clubs. The NRFU immediately made changes. In addition to the time before 1948 when an international governing body was established, members of the International Federation and its predecessors have had the authority to make significant changes to the Laws applied within their jurisdiction.
 The following is an incomplete list of changes made to the laws of rugby league since the 1895 schism. Changes to the laws used for senior competitions within the jurisdictions of RLIF members with test nation status are included here.
 Additional detail: Included are the flags or icons of the territory affected as well as the name of the governing body responsible and a link to the first season the change was implemented in senior competition (s) by that body. If a Law has since been changed, the Law's current status is indicated, and a link given to the year of the change in this article.
 NRFU Implemented: 1895–96 Northern Rugby Football Union season.
 NRFU Implemented: 1896–97 Northern Rugby Football Union season.
 NRFU Implemented: 1897–98 Northern Rugby Football Union season.
 NRFU Implemented: 1899–1900 Northern Rugby Football Union season.
 NRFU Implemented: 1900–01 Northern Rugby Football Union season.
 NRFU Implemented: 1901–02 Northern Rugby Football Union season.
 NRFU Implemented: 1902–03 Northern Rugby Football Union season.
 NRFU Implemented: 1903–04 Northern Rugby Football Union season.
 NRFU Implemented: 1904–05 Northern Rugby Football Union season.
 NRFU Implemented: 1906–07 Northern Rugby Football Union season.
  NSWRFL Implemented: 1909 NSWRFL season.
  NSWRFL Implemented: 1920 NSWRFL season.
  NSWRFL Implemented: 1922 NSWRFL season.
  NSWRFL Implemented: 1926 NSWRFL season.
  RFL Implemented: 1927–28 Northern Rugby Football League season.
  NSWRFL Implemented: 1931 NSWRFL season.
  NSWRFL Implemented: 1932 NSWRFL season.
  NSWRFL Implemented: 1948 NSWRFL season.
  RFL Implemented: 1950–51 Northern Rugby Football League season.
  NSWRFL Implemented: 1951 NSWRFL season.
  NSWRFL Implemented: 1952 NSWRFL season.
  NSWRFL Implemented: 1954 NSWRFL season.
  NSWRFL Implemented: 1956 NSWRFL season.
  NSWRFL Implemented: 1959 NSWRFL season.
  NSWRFL Implemented: 1961 NSWRFL season.
  NSWRFL Implemented: 1963 NSWRFL season.
  NSWRFL Implemented: 1964 NSWRFL season.
  NSWRFL Implemented: 1966 NSWRFL season.
  RFL Implemented: 1966–67 Northern Rugby Football League season.
  NSWRFL Implemented: 1967 NSWRFL season.
  NSWRFL Implemented: 1968 NSWRFL season.
  NSWRFL Implemented: 1969 NSWRFL season.
  NSWRFL Implemented: 1970 NSWRFL season.
  NSWRFL Implemented: 1971 NSWRFL season.
  RFL Implemented: 1972–73 Northern Rugby Football League season.
  NSWRFL Implemented: 1981 NSWRFL season.
  NSWRFL Implemented: 1982 NSWRFL season.
  NSWRFL Implemented: 1983 NSWRFL season.
  NSWRL Implemented: 1986 NSWRL season.
  NSWRL Implemented: 1987 NSWRL season.
  NSWRL Implemented: 1988 NSWRL season.
  NSWRL Implemented: 1989 NSWRL season.
  NSWRL Implemented: 1990 NSWRL season.
  NSWRL Implemented: 1991 NSWRL season.
 IRLB Implemented: 1993 NSWRL season.
  NSWRL Implemented: 1993 NSWRL season.
  RFL Implemented: 1994–95 Rugby Football League season.
 SLIB Implemented: 1996 Super League World Nines.
  ARL Implemented: 1996 ARL season.
   RFL Implemented: Super League I.
  ARL Implemented: 1997 ARL season.
  SL (A) Implemented: 1997 Super League (Australia) season.
  NRL Implemented: 1998 NRL season.
  RFL Implemented: Super League IV.
  NRL Implemented: 2001 NRL season.
  RFL Implemented: Super League VI.
  RFL Implemented: Super League VIII.
  NRL Implemented: 2004 NRL season.
  NRL Implemented: 2006 NRL season.
  NRL Implemented: 2008 NRL season.
  RFL Implemented: Super League XIII.
  NRL Implemented: 2009 NRL season.
  RFL Implemented: Super League XV.
  NRL Implemented: 2010 NRL season.
  RFL Implemented: Super League XVI.
  RFL Implemented: Super League XVII.
  RFL Implemented: Super League XVIII.
  RFL Implemented: Super League XXIV.