Fifa adapts its transfer regulations on an interim basis after the recent Lassana Diarra legal ruling but accepts they could be open to immediate challenge.

The world soccer players' union, FIFPRO, disagreed with FIFA's interim amendments to transfer rules, implemented following a European Court of Justice ruling against some existing regulations.

The January transfer window is usually a silent period, but some key new regulations are set to kick in from the forthcoming period onwards.

FIFA has adopted an interim framework concerning the Regulations on the Status and Transfer of Players, world soccer's governing body said on Monday, following a Court of Justice of the European Union ruling.