By the treaty Sicard recognised the rights of merchants from the three cities to travel through his domains. He made navigation up the rivers Patria, Volturno, and Minturno open to merchants, responsales (envoys), and milites (soldiers). Sicard did not give up his powers of enforcement over the illegal slave trade (in Lombards) and trafficking stolen merchandise. He did abolish the lex naufragii (law of shipwreck) by which the landowner on whose shores a wrecked ship or its cargo washed up was the possessor of that wealth: "if a ship is wrecked because of the fault [of the men aboard] the goods found in it are to be returned to the one to whome they belonged and still belong." This measure, protecting the property rights of shipping companies and merchants, was "far in advance of thes times".
Despite these efforts, war began again in 837, when Duke Andrew called in Saracens as allies against Benevento. In 838 Sicard captured Amalfi by sea.