Sat Jun 16, 2012 10:02 pm
You need a commercial agreement and at least cordial relations (+25 minimum) with the other nation, otherwise the propability that they seize your structures is very high. If its not an option in the diplomatic menu, then you already have one (when playing as Prussia you get the opportunity when the Zollverein event happens), and they seized it because of bad relations. If they didnt seize it and the structure is simply inoperable, its either that you dont have the commercial agreement or the population in Holstein is at strike
Passage rights is only for troops