Relations between the Ottoman officials and the local peasantry were governed by the statutes of the Muslim holy law (shari‘a), Ottoman regulations (kanun), and local customary practices (‘örf). The three sources of law did not govern entirely discrete areas. All together served as the basis for decisions by the kadi, especially in regard to administrative practices. The shari‘a laid down rules about tithes on agricultural produce and the poll tax on non-Muslim subjects (zimmis). The more general guidelines of the shari‘a were often supplemented by the detailed provisions of kanuns. And the kanuns were typically informed by local practice as discovered by the Ottoman officials who carried out the initial provincial surveys and those who governed in the numerous provinces of the empire. The Ottoman administrative regime, therefore, did not impose a rigid code of laws uniformly on all conquered populations of the empire.