This lex sacra from a temple in Teos could serve as a model for the Hymnōdai:

The boule and demos have resolved that the ephebes and the priest of the paides are to sing hymns every day at the opening of the temple of Dionysos, the leading God of our city. And at the closing of the temple of the God the priest of Tiberius Caesar is to make libations, burn incense, and light lamps; expenses are to be paid from the sacred revenues of Dionysos. And the archons of the city are to always sacrifice at the beginning of each month and on the seventh day pray for the success of the city. But if any person offends any of these requirements, that person is asebes. And this decree is to be engraved in the sanctuary of Dionysos and it is to have the status of law. (SEG XV.718)