In this paper I postulate that the original function of the srāošāuuarəza- is the recitation of the formula sraōšō astu (srōš barišnīh), and provide an analysis of the function of this formula in the Long Liturgy. It has an Indo-Iranian background and plays an important role in the Long Liturgy. Because of the dependence of previous editions on the exegetical manuscripts, the formula has never been recorded in the different variations it displays in the liturgy. Some instances have never been edited at all, and others only partially, leading to an incorrect understanding of several texts included in this formula. Furthermore, I present some thoughts about the materials, problems, and methods for the study of the Avestan priestly college and its evolution.
