An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) The power to determine, adjudicate, or otherwise settle issues or disputes; jurisdiction; the right to control, command, or determine (Dictionary.com).
2) A person or body of persons in whom authority is vested, as a governmental agency (Dictionary.com).

→ author; → -ity.

Dâtârgân, from dâtâr, → author, + -gân, on the model of xodâygân "a great lord."