Why would that be so? I can't think of any central figures of human religious that are required to perform based upon rigid codes. Moses is commanded by G-d, not the priesthood. Jesus argues directly with the priesthood. If anything, they are granted or win leeway for themselves. Their lives are far from orchestrated in terms of what they must do and say.Beyond the prophecies that tell what the Emissary is going to achieve, I doubt there was any mention of finer detail. The point was that thanks to the timeless Prophets, it would be consistent and theoretically possible that ancient texts actually obligated Benjamin Lafayette Sisko to speak specific phrases in a specific language in specific situations.I don't remember the roles and the actions of the Emissary being codified.