Self-existing Perfection (Tibetan: རྫོགས་པ་རང་བྱུང, Wylie: rdzogs pa rang byung) is one of the Seventeen tantras of Dzogchen Upadesha.
Kunsang (1987, 2007: p.90) provides the following summary of this Dzogchen tantra and foregrounds the premier motif of the four empowerments:
"...[it] teaches how to prepare to be a suitable recipient of the teachings by means of the four empowerments."
References
Self-existing Perfection Wikipedia(Text) CC BY-SA