Subject to the special rules laid down in the acts and agreements referred to in 2° and 3° of Article R. 53-19-1, the operations carried out under the said provisions:
1° Are carried out by agents specially authorised for this purpose by the requesting international organisations or States;
2° Are subject, on the part of these agents, to prior reasoned requests;
3° Give rise to a registration under the conditions provided for in Article R. 53-18-1.