History of the Peloponnesian War

5. If any of the cities, whether inside or outside Peloponnese, have a question whether of frontiers or otherwise, it must be settled; but if one allied city should have a quarrel with another allied city, it must be referred to some third city thought impartial by both parties. Private citizens shall have their disputes decided according to the laws of their several countries.

The treaty and above alliance concluded, each party at once released everything whether acquired by war or otherwise, and thenceforth acting in common voted to receive neither herald nor embassy from the Athenians unless they evacuated their forts and withdrew from Peloponnese, and also to make neither peace nor war with any, except jointly.