1. Where it is technically impossible to proceed with the query referred to in Article 45(1), because of a failure of any part of the ETIAS Information System, the carriers shall be exempt from the obligation to verify the possession of a valid travel authorisation. Where such a failure is detected by eu-LISA, the ETIAS Central Unit shall notify the carriers and the Member States. It shall also notify the carriers and the Member States when the failure is remedied. Where such a failure is detected by the carriers, they may notify the ETIAS Central Unit. The ETIAS Central Unit shall inform the Member States without delay about the notification of the carrier.
2. The penalties referred to in Article 45(5) shall not be imposed on carriers in the cases referred to in paragraph 1 of this Article.
3. Where, for other reasons than a failure of any part of the ETIAS Information System, it is technically impossible for a carrier to proceed with the query referred to in Article 45(1) for a prolonged period of time, the carrier shall notify the ETIAS Central Unit. The ETIAS Central Unit shall inform the Member States without delay about the notification of that carrier.
4. The Commission shall, by means of an implementing act, lay down details of the fall-back procedures referred to in this Article. That implementing act shall be adopted in accordance with the examination procedure referred to in Article 90(2).
5. The ETIAS Central Unit shall provide operational support to carriers in relation to paragraphs 1 and 3. The ETIAS Central Unit shall establish standard operational procedures setting out how such support is to be provided. The Commission shall, by means of implementing acts, adopt further detailed rules relating to the support to be provided and to the means to provide such support. Those implementing acts shall be adopted in accordance with the examination procedure referred to in Article 90(2).