Original offside rule
The offside rule formed part of the original rules in 1863 but it was a far remove from the law as we know it today. Any attacking player ahead of the ball was deemed to be offside - meaning early tactical systems featured as many as eight forwards, as the only means of advancing the ball was by dribbling or scrimmaging as in rugby. In the late 1860s, the FA made the momentous decision to adopt the three-player rule, where an attacker would be called offside if positioned in front of the third-last defender. Now the passing game could develop.
Despite the unification of the rules and the creation of the FA in 1863, disputes, largely involving Sheffield clubs who had announced their own set of ideas in 1857, persisted into the late 1870s. However, the creation of the International Football Association Board (IFAB) finally put an end to all arguments. Made up of two representatives from each of the four associations of the United Kingdom (England, Scotland, Wales and Ireland), the IFAB met for the first time on 2 June 1886 to guard the Laws of the Game. Then, as today, a three-quarters majority was needed for a proposal to be passed.