Norma relacionada
Practice Relating to Rule 10. Civilian Objects’ Loss of Protection from Attack
Section B. Situations of doubt as to the character of an object
Nigeria’s Military Manual (1994) provides that when “hospital ships, coastal rescue craft, ships sailing under special agreements … are of a dubious status, i.e., when it is uncertain whether it is a military objective or not, in that case, it may be stopped and searched so as to establish its status”. 
Nigeria, International Humanitarian Law (IHL), Directorate of Legal Services, Nigerian Army, 1994, p. 45, § 16(d).