values: allows the unit to be placed in territories that don't contain factories. only "constructionsPerTerrPerTypePerTurn" contructions of "constructionType" may be placed per territory per turn.

may have only "maxConstructionsPerTypePerTerr" constructions Total per territory with/without a factory unless you enable "More Constructions with/without Factory", which will allow up a total number of up to the territory value

and "Unlimited Constructions" game property allows unlimited constructions total in a territory