This Article will examine the Aramco arbitration together with the authorities upon which the Tribunal relied. It will also consider other authorities and sources of law which might offer the evidence in support of a right of entry. The second part of the Article will attempt to define a right of entry, and it will discuss the sparse precedents of State practice. It will then review the arguments advanced by publicists concerning the right of entry. Finally a formulation of the current body of law will be attempted, suggesting that no right of entry has been established in customary international law