1. Disputes shall fall within the competence of the competent bodies of the Member State of the applicant authority, and shall be governed by the law of that Member State, where they concern:
(a) the lawfulness of an act to be notified in accordance with Article 25 or a decision to be enforced in accordance with Article 26; and
(b) the lawfulness of the uniform instrument permitting enforcement in the Member State of the requested authority.
2. Disputes concerning the enforcement measures taken in the Member State of the requested authority or concerning the validity of a notification made by the requested authority shall fall within the competence of the competent bodies of the Member State of the requested authority and shall be governed by the law of that Member State.