Thanks. That covers some aspects of what I am asking but not the core. https://secure.wikimedia.org/wikipedia/en/wiki/Restrictive_covenant https://secure.wik

Thanks. That covers some aspects of what I am asking but not the core. https://secure.wikimedia.org/wikipedia/en/wiki/Restrictive_covenant https://secure.wikimedia.org/wikipedia/en/wiki/Restrictive_c... covers restrictive covenants on real estate and covers the case of racial segregation that I knew about. Still not quite what I was looking for.