Churchwardens' duties may vary with the customs of the parish or congregation, the canons of the diocese to which the parish belongs, the desires of the priest, and the direction of the parish board or the congregation as a whole. A definition of their duties is that they are "ultimately responsible for almost everything in a church which does not have to be done by a priest. If the churchwarden does not do it himself, then he is responsible for making sure that it is done by someone".