These sites provide information on the agreements enacted between the U.S. and other countries worldwide, which may affect the extent of imports and exports. Data includes overviews of treaties, tariffs, restrictions by country and material, and more.
Almost all municipalities have regulations that govern the ways land can be used. Zoning regulations are highly localized and no comprehensive national database of laws exists. In most cases, to find zoning and land-use regulations in a particular area, search for a community's zoning board.