Related Rule
Mexico
Practice Relating to Rule 117. Accounting for Missing Persons
Section D. Right of the families to know the fate of their relatives
Mexico’s Army and Air Force Manual (2009) states: “Families have the right to know what has become of their relatives.” 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 204.