OBS_VALUE: The competent authority may refuse to grant an approval if there is no reciprocity as regards wet leasing between the EU Member State concerned or the EU and the third country where the wet-leased aircraft is registered. If reciprocal conditions apply, an approval is still required. Approval is granted only on the basis of exceptional or seasonal capacity needs by the air carrier, or when the leasing is necessary for the air carrier to overcome operational difficulties and no EU-registered aircraft is available. 