1. Subject to the provisions of Article 99a, the duties and taxes to be levied are those in force on the date of registration of the retail declaration.
2. In the event of a reduction in the rate of customs duties, the declarant may request the application of the new tariff which is more favourable than that which was in force on the date of registration of the itemised declaration for consumption, if the authorisation provided for in Article 113 has not yet been given.