Where every other charter here grants land and immunity to a monastery, this one regulates a foreign trade. It is the settlement of a running quarrel: unlike Byzantium, which let Venetian merchants trade duty-free, Ivan Alexander's chancery held them to a firm fiscal policy, and had confiscated the goods of Venetian nobles who refused to pay. The charter fixes the terms that ended the dispute — a 3% duty, scheduled port and weighing fees, judicial protection against seizure, and the right to build churches and loggias — and so opens a rare window onto the customs regime, the coinage, and the Black Sea ports of the fourteenth-century empire.
It is also a document of the tsar's own person: he swears the privilege on God, the Virgin, the True Cross, St Petka of Tarnovo and his own soul, and closes by branding any who break it a traitor to his empire.