Par in parem non habet imperium
Principle in international law
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Par in parem non habet imperium (Latin for 'equals have no sovereignty over each other') is a general principle of international law, forming the basis of state immunity.[1][2]
Consequence
Because of this principle, there is the duty of courts to abstain from reviewing the legality of sovereign acts carried out by foreign states (act of state doctrine): a sovereign state cannot exercise jurisdiction over another sovereign state.[3][4][5]