Oystra Stoorskerið
From MicrasWiki

Oystra Stoorskerið (Hurmu Norse for "East Great Skerry") is a Hurmu–Phineonesian condominium in the Skerries, consisting of the eastern part of Great Skerry/Skerryvore (which is shared with Nouvelle Alexandrie's New Luthoria region).
The condominium consists of the territories of:
A treaty creating the condominium was signed during the state visit of Phinbellan president Muhammad Furkorn Mat Jeen to Hurmu, on 21.VII.1717 AN. On 6.VIII.1717, the Senate of the Lakes ratified the treaty and it entered into force.
It is part of the Hurmu Customs Area.