The Vendidad — properly Videvdad, the law against the demons — is twenty-two chapters of Late Avestan and it is the only Avestan nask preserved complete, precisely because priests needed it in daily use. Its content is largely purity law: the handling of corpses and the elaborate procedures for those who become polluted by contact with them, the treatment and legal protection of dogs, regulations concerning menstruation, penances and their tariffs, and a catalogue of sins with prescribed atonements. It also contains the Yima narrative and a geographical list of sixteen lands created by Ahura Mazda. Its status is the sharpest fault line in modern Zoroastrian argument: reformist Zoroastrians, particularly in Iran and North America, argue that it is a late priestly accretion at odds with the ethical monotheism of the Gathas and should be treated as historical rather than binding, while traditionalists hold that it is scripture and that the purity system it encodes is the religion's operating structure. Both positions have real textual arguments available.