Most backgrounds end with "you gain access to the X trait". But Ultimate Campaign doesn't define what "access" means, so we have two options for how to make use of that - "Traits & Drawbacks require a Background" means a strict reading - that you can't take a trait or drawback without one of your backgrounds making it available, or "Unrestricted Traits & Drawbacks", where the ones your background gave access to will be starred as suggestions, but you can still pick whatever traits you want.
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