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Feudal Expansion Policy

Adds a new policy to prohibit/allow vassals to expand beyond their existing borders. This is similar to the vanilla civic "Feudal Societies" - but the policy is available to all types of empires (including robotic/non-imperial.)

Like other policies, the setting can only be flipped once every 10-years.

Defaults to denied (vanilla setting).
AI players will always prefer to use the setting 'denied' over 'tolerated' so this mod is aimed at players who desire this odd play style.

For a different version of this mod that only adds the policy to empires that have the "Feudal Society" civic, see my workshop - https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1365910865