What are the rules?
As has been the case for a few seasons now, each of the UEFA Champions League round of 16 hopefuls is allowed to register a maximum of three new eligible players. Unlike previous seasons, however, it no longer matters if those players have already played in the competition for another club, or for another club still in the competition.
Clubs must communicate their desired squad changes by 24:00CET on 1 February at the latest. Once all 16 teams' changes are approved by UEFA, the full list of ins and outs will be published on UEFA.com.
Here are the relevant extracts from the official competition regulations:
For further details about player registration at this stage of the season, check out Article 45 of the regulations in full.
It's largely business as usual, though a few more changes were also announced in March:
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