Under International law the obligation of neutral country is

Under the law of neutrality, reflected in Hague Conventions V and XIII of 1907, a neutral State must abstain from assisting either belligerent, prevent belligerents from using its territory for hostilities, and acquiesce in lawful belligerent measures such as visit and search of its merchant ships. Hague Convention V states that "the territory of neutral Powers is inviolable", and all three duties together make up the obligations of neutrality.