Championship Cardiff boss Neil Warnock says new loan signing Marko Grujic must play in at least 14 games this season, otherwise the Bluebirds will be "financially punished" by Liverpool.
"It's quite acceptable. I think it's a good deal for both parties, because I want to play him," said Warnock.
Warnock added: "I'm not signing him to make the numbers up. He's a good lad and a good player. All of our scouts have recommended him to us."
"I think we can be good for him. I think we can get him match-fit. There's a World Cup this summer, and he has ambitions to go to that. So if we can get him up and running, that will be great for both parties," Warnock added.
"We won't get punished if he gets injured and things like that. We've got 19 league games, and hopefully he'll play in all of them.
"A lot of clubs take players from the Premier League and don't play them. Well that's a waste of time. Same as me sending someone out, if they make up the numbers it's pointless.
"We'll have to look at penalising clubs if they don't play them for a percentage of games.
"Jurgen really likes the lad, and he wants him to continue his education. And he just wants to come and play."