3. If a formally initiated supervisory procedure, which requires a decision, cannot be completed prior to the date on which a change in the supervisory competence occurs, the authority whose competence ends shall remain competent to complete such pending supervisory procedure. For this purpose, the authority whose competence ends shall also retain all relevant powers until the supervisory procedure has been completed. The authority whose competence ends shall complete the pending supervisory procedure in question in accordance with the applicable law under its retained powers. The authority whose competence ends shall inform the authority assuming supervision prior to taking any decision in a supervisory procedure which was pending prior to the change in competence. It shall provide to the authority assuming supervision a copy of the decision taken and any relevant documents relating to that decision.