Quote Originally Posted by k_raso
Now: Is it a feature or a bug?
A feature, but we need to update the text to match the effect. Romani are somewhat unique in this regard.

Essentially there are supposed to be six provinces where you can build a Camillan MIC - the five mentioned plus Segesta, but for some reason the building to trigger that was placed in Messana. Our bad - that'll be fixed for the 0.81 patch.

Regardless, Camillan troops only come from those six regions. (This is what needs to be listed in the MIC text.) When Polybian reforms occur, you can construct factional MICs in any Romani region with a Type I government. At that point Liguria should allow you to recruit Polybian troops.