Political Laws have been the subject of a much disputed doctrine. It has been stated by Dicey, and by other authoritative writers in various countries, that a court has no jurisdiction to entertain an action for the enforcement of a "political law" of a foreign state. The term "political law" is not limited to the field of public law. It is, of course, only exceptionally that rules governing the relations between a state and its citizens are given extraterritorial effect. The doctrine goes further. It holds that rules which are technically a part of private law, but which are designed to supplement the commands and prohibitions of public law, be regarded as "political" and treated on the same basis as public law.
Evsey S. Rashba,
FOREIGN EXCHANGE RESTRICTIONS AND PUBLIC POLICY IN THE CONFLICT OF LAWS: PART II,
Mich. L. Rev.
Available at: https://repository.law.umich.edu/mlr/vol41/iss6/5