According to hedgetrimmer, the OAS is the supranational body to govern the Western Hemisphere, as designated by the Free Trade of the Americas Agreement.
So, when you want to fight that parking ticket, dispute that property tax increase or lobby your elected representative, don't bother, the OAS has power over the entire Western Hemisphere.
Well you haven't even explained the OAS acronym yet for those who don't know. Can't you tell us in your own words?