Most football leagues around the world follow FIFA’s Regulations on the Status and Transfer of Players (“RSTP”) to control the player transfer system through rules that balance player and team interests.
The current version of the RSTP (referred to by FIFA as simply the “Regulations”) is dated as of December, 2017.
FIFA Regulations on the Status and Transfer of Players
FIFA also made certain amendments to these regulations, which took effect on June 1, 2018.
Summary of the Amendments