 Parliamentary bills pertaining to the constitution are vetted by the Council of Guardians.According to one scholar, the administration of justice in Islamic Iran has been until recent times

a loosely sewn and frequently resewn patchwork of conflicting authority in which the different and sometimes conflicting sources for Islamic law—the jurists, the actual judges, and the non-Islamic law officials of the king - disputed with each other over the scope of their jurisdictions....
some aspects of the law always remained in the hands of the mullahs ...