The Financial Fair Play regulations imposed by European governing body UEFA are designed to ensure that clubs spend within their means
City accepted sanctions at the end of last season for breaching the rules, among them a fine and restrictions on the club's Champions League squad
However, that has not stopped the Blues from this week spending Â£28million to sign Wilfried Bony from Swansea
Mourinho congratulated his title rivals for their acquisition, albeit with a less-than-veiled dig at such transfer activity.
"Well done, well done - good player, good striker, if they have the money and can spend it and have no problems with Financial Fair Play, well done," he said ahead of Chelsea's trip to Swansea.
"I think they can only play with 11, unless the rules for them are different and they can play with 12.
"It looks like the rules are different for them in certain aspects, but not this one
If Bony plays and Dzeko is on the bench, I am happy with that
"Fantastic squad, one more top player for that squad to have Aguero, Jovetic, Dzeko and Bony is absolutely magnificent
I repeat, well done."
Asked what other aspects are different for them, Mourinho retorted: "You know what I mean."
Source : PA