The NY Port Authority article does go into some detail about the governmental body although it does not explain who appoints its top people non port duties the LA Port article explains that it is part of the City of Los Angeles However I agree with you that none of these articles explain how these obviously public bodies are set up are their managers elected by voters appointed by the state or promoted up from lower beauracratic positions But AFAIK all ports in the US are run by public agencies so some discussion of their types of organization would make for an appropriate Wikipedia article