A technical device may be used, by means of airborne cameras, for the purpose of capturing, fixing, transmitting and recording without their consent the image of one or more persons in a public place, if this operation is required by the necessities:
1° An investigation or enquiry into a crime or misdemeanour punishable by at least three years’ imprisonment;
2° An investigation or enquiry into the causes of death or disappearance provided for in Articles 74,74-1 and 80-4 ;
3° A procedure to search for a fugitive provided for in article 74-2.