In France, the transfer window opens on June 9, while in Italy and Germany business can be completed from July 1.
"This means that any worldwide transfers can not be processed until the FIFA TMS transfer window opens".
Following a dismal campaign and the likely arrival of a new manager, this ought to be a busy window for the 2016/17 Premier League champions.
"Before then, clubs are able to agree deals for the acquisition of players but, in the case of a domestic transfer, the paperwork can not be processed until after midnight on May 17, once the window opens".
'The EFL transfer window is already open.
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The EFL transfer window opened on May 7.
'EFL clubs will still be able to sign players on loan until August 31.
We'll keep you up to date with the very latest transfer news concerning your club in our daily gossip and rumours column.
Very quickly it became known that the next Summer Transfer Window would end on Thursday 9 August at 5pm, with the matches set to start that following weekend.
Last year's summer transfer window saw the world record broken for the most expensive move in football history as Neymar joined Paris Saint-Germain from Barcelona in a £198m deal.
They are expected to formally announce the change by Wednesday evening with member clubs able to buy and sell players from Thursday.