Siyasa Shar’iyya Definition: Muslim law: the legal authority of Muslim theocracies to supplement the broad criminal law principles of the Koran and other Muslim legal texts of sacred origin, on points of detail. Pearl defines siyasa shar’iyya as: “The right of the executive branch of the (Muslim) government to complete the Sharia by regulations of an administrative kind.” REFERENCES: Pearl, D., A Textbook on Muslim Law (London: Croom Helm Ltd., 1979), page 20 Categories & Topics: Muslim Law Dictionary Find you are constantly looking up definitions? Try our search provider (works in most modern browsers) If you find an error or omission in Duhaime's Legal Dictionary, or if you have legal term suggestion, we'd love to hear from you!