Article 23 9.

In the event of a change to the information set out in the documents submitted in accordance with paragraph 3 or paragraph 4, as applicable, the CSD shall give written notice of the change to the competent authority of the home Member State at least one month before implementing the change. The competent authority of the host Member State and the college referred to in Article 24a shall also be informed of that change without delay by the competent authority of the home Member State.