The Commission shall, by amending this Regulation through a decision in accordance with the regulatory procedure with scrutiny referred to in Article 19(3), set criteria to allow Member States to derogate from the common basic standards referred to in paragraph 1 and to adopt alternative security measures that provide an adequate level of protection on the basis of a local risk assessment. Such alternative measures shall be justified by reasons relating to the size of the aircraft, or by reasons relating to the nature, scale or frequency of operations or of other relevant activities.
On imperative grounds of urgency, the Commission may use the urgency procedure referred to in Article 19(4).
The Member States shall inform the Commission of such measures.