14. Save in duly justified exceptional circumstances, the Review Panel shall render its opinion within 60 days of its receipt of the Authority’s response pursuant to paragraph 4 of this article. Article 28 Costs of the review 1. Upon completion of the review of a regulatory measure, even where the request is withdrawn, the Review Panel may issue such instructions as it may deem appropriate regarding the allocation of costs incurred among the service provider seeking review, the interested parties that have joined the process, and the Authority. 2. The costs of the review process shall include the reasonable fees and expenses of the Review Panel and the parties to the review. 3. The Review Panel may require the service provider seeking review, any interested party that may have participated in the review process, including the Authority, to make payments on account, it being that: a) If the service provider seeking review fails to comply with a requirement for payments on account, the Review Panel may suspend the review process and set a time limit for compliance, which shall not be less than 14 days, and if the service provider seeking review has not complied by the expiry of such time limit, the application for review shall be deemed to have been withdrawn; and b) Where any other party who is joined to the process fails to comply with a requirement for payments on account, they shall not be permitted to continue in the process. 4. Any payments on account in excess of the amount ordered by the Review Panel pursuant to paragraph 1 shall be refunded. Article 29 Judicial review 1. All regulatory measures adopted by the Authority may be appealed to the competent courts. 2. No provision in the present Decree-Law shall affect the right of service providers to, at any time, apply to a competent court for judicial review. 3. In any request for reconsideration of a regulatory measure filed pursuant to article 27, the time limit applicable for bringing such review before the courts shall be extended by a period equivalent to that between the date of approval of the regulatory measure under review and the date the Authority renders its reconsideration pursuant to paragraph 10 of that Article.