If no State is designated under paragraph 1, the sentence of imprisonment shall be served in a prison facility made available by the host State, in accordance with the conditions set out in the headquarters agreement referred to in article 3, paragraph 2.
e) Toute autre circonstance relative au crime, à la situation de la personne condamnée ou à l’exécution effective de la peine, susceptible de guider le choix de l’État chargé de l’exécution. 4.