As I understand it (but could well be wrong!) the transfer window rules and regs are developed per "international division" (eg UEFA set their rules, CAFCASS their own etc) as Gyan went from one system to another, so long as he abides by the receiving club's scheme he is OK to go. I was more confused when I heard about the "loan transfer window" a day or so ago but think it only applies to Championship and below. All we can get are free agents and even then I have no idea how the 25 man squad thing works - in terms of removing someone from it if we get a gem as a free agent (but that is probably desperately wishful thinking!)
Happy days