Ordinarily, the commission(s) will assist the bishop(s). The CDWDS offers many cautions on the road from experimentation to a more widespread implementation:
67. The episcopal conference will supervise the process of experimentation, (SC 40) normally with the help of the national or regional liturgical commission. The conference will also take care to ensure that the experimentation does not exceed the limits of time and place that were fixed. It will also ensure pastors and the faithful know about the limited and provisional nature of the experiment, and it will not give it publicity of a sort which could have an effect on the liturgical practice of the country. At the end of the period of experimentation, the episcopal conference will decide whether it matches up to the goal that was proposed or whether it needs revision, and it will communicate its conclusions to the congregation along with full information about the experiment.
68. After examining the dossier, the congregation will issue a decree giving its consent, possibly with some qualifications, so that the changes can be introduced into the territory covered by the episcopal conference.
69. The faithful, both lay people and clergy, should be well informed about the changes and prepared for their introduction into the liturgical celebrations. The changes are to be put into effect as circumstances require, with a transition period if this is appropriate (cf. above No. 61).