Dastur

sometimes spelt dustoor, is a term for a Zoroastrian high priest who has authority in religious matters and ranks higher than a mobad or herbad.

In this specific sense, the term is used mostly among the Parsis of India.

[1] The first person to be accorded the title Dastur was Meherji Rana (born 1514 at Navsari).

[2] He was accorded the title in 1579 AD by the local Zoroastrian priests thus establishing a seat (Gaddi, similar to the seat of a Bhattaraka or Sankaracharya).

Dastur Kaikhushru Cowasji Ravji became the eighteenth successor to the seat and title of Meherji Rana in 2019.