From a modern perspectieve the answer to this question seems rather simple; the church, or rather the official gremium to which the task has been assigned by ecclesial procedure is in charge to do so. However, the historically sound answer is far more complex for the period in which the Dutch liturgy developed, the second half of the sixteenth and the beginning of the seventeenth century. In this paper I scout this early phase. On the one hand it is an individual (for example, Petrus Dathenus), on the other hand an ecclesial gathering, or even the government, which takes the lead. In most cases, there is a degree of cooperation. In all this, it should not be forgotten that it is the local churches that ultimately determine the liturgical practice.