Ownership of certain islands and river islands

The islands formed in the seas adjoining the Portuguese territory and on navigable rivers shall belong to the State and may only be acquired by private person through lawful grant or by prescription. § Sole paragraph – However, if at the time of formation of the islands or banks of rivers, any of the property on the river bank suffer loss, the river islands or river bank so formed shall belong to the owners of the property wherein the decrease in area has taken place and in proportion to the same.