the Bosman ruling
noun [ S ] uk/ˈbɒzmən ˌruː.lɪŋ/ us/ˈbɑːzmən ˌruː.lɪŋ/
博斯曼法案（欧洲法院认可，有欧盟公民资格的足球运动员，在与俱乐部合同期满之后，有权在不支付任何转会费的情况下到欧盟另外任何国家踢球）
a decision by the European Court of Justice allowing professional football players in the European Union to move to a another club at the end of their existing contract without their old club receiving a transfer fee (= money from the club that buys the player)
After the Bosman ruling, a player was free to leave as soon as his contract expired. 在博斯曼法案之后，合同一到期球员即可离开。