A dastūr is a Zoroastrian high priest who has authority in religious matters and ranks higher than a Mobad or Herbad.
In modern usage the term dastūr refers mostly to Parsi priests in India. Zoroastrianism is the religion and philosophy based on the teachings ascribed to the prophet Zoroaster (Zarathustra, Zartosht). ... A Parsi (IPA: ), sometimes spelled Parsee, is a member of the close-knit Zoroastrian community based in the Indian subcontinent. ...