What was the worst provision of the navigation acts

Manufacturing of goods such as paper, cloth, and metal goods was permitted only in Britain itself

The worst provision of the Navigation acts is legislation, trade, with the colonies was to be managed only in English or colonial ships. Itemize products such as sugar, tobacco, and indigo were to be shipped only within the empire. Trade destined for nations outside the empire had to go first to England. The worst result of Navigation acts was the stifling of colonial manufacturing and increased resentment against the mother country.