Most of the systems cut across traditional political boundaries and some are small, serving only one city.

Administrative and political boundaries have been changed a number of times.

The maps are in full color, complete with place names and political boundaries.

But since water knows no political boundaries, it can hardly be the whole truth.

They want to know the legal, ethical, and political boundaries of the program.

An economy is no longer defined by the political boundaries of a city, county or state line.

Water distribution has everything to do with political boundaries, economic development and wealth.

Its political boundaries often do not coincide with those of nature.

A map of Europe, without political boundaries, is at the back.

Migration generally takes place within the political boundaries of a single state these days.