So ive searched and havent found an answer ive been looking for. I just got the game and the 5-6 expansion and someone i know says that when you upgrade a settlement on a harbor to a city you can change the harbor rate to one thats no in play.
so example if you have a city on a 3-1 ? you have an option to change it to one of the chits too a 2-1 wood.
is this a rule in the book because i havent seen it.
You couldn't find it in the rule book since it is no official rule.
Dr. Reiner Düren