An archipelagic State may draw straight archipelagic baselines joining the outermost points of the outermost islands and drying reefs of the archipelago provided that within such baselines are included the main islands and an area in which the ratio of the area of the water to the area of the land, including atolls, is between 1 to 1 and 9 to 1.
Arhipelaška država lahko določi ravne arhipelaške temeljne črte tako, da združi najbolj zunanje točke bolj obrobnih otokov in nadvodnih grebenov v arhipelagu, pod pogojem, da so s temi črtami zajeti glavni otoki in območje, v katerem je razmerje med površino vode in kopnim, vštevši atole, med ena proti ena in devet proti ena.