The Korth Edict
When Galifar the First sought to unify Khorvaire, and it quickly became apparent to the patriarchs of the dragonmarked houses that he might well succeed where Karrn had failed.
The house leaders met Galifar in the city of Korth at the height of his drive to unite the Five Nations, the would-be king swore to protect the houses, agreeing to a number of provisions that would ensure their continued economic strength. In return, the houses agreed to restrictions on their political power.
For a thousand years, the Korth Edicts prevented any member of a dragonmarked house from holding a grant of land and placed limits on the size of house enclaves and the armed forces garrisoned there.
Special provisions were made for House Deneith, which retained the right to assemble military forces for mercenary service.
Other provisions where made that restrict each houses activities for example House Vadalis is not allowed to work with sentient beings, restricting themselves to animals or monsters.
The edicts further specified that no member of the aristocracy of Galifar could be bound to a member of a dragonmarked house in marriage without one of the two giving up all heritage and rights.
Since the houses did not own land, the edicts dictated a system of rents to be paid to the crown in exchange for the territory the houses required for their needs.