The 2019 MLS Primary Transfer Window opened on Wednesday, meaning clubs can now officially register their offseason additions. The window will be open from Feb. 13 until May 7.
Per FIFA regulations, MLS teams are able to request International Transfer Certificates (ITC) from players' former clubs to complete signings, loans and transfer deals. While deals can otherwise be completed outside the transfer windows, receipt of a player's ITC is required in order to add players to official rosters and for those players to be eligible to play in competitive matches.
Clubs may also transfer or loan their players to non-MLS clubs at any time, subject to the transfer window of the recipient club's national federation and subject to the consent of the player.
The Secondary Transfer Window will open on July 9 before closing on Aug. 7.