القاعدة ذات الصلة
Mexico
Practice Relating to Rule 100. Fair Trial Guarantees
Section D. Information on the nature and cause of the accusation
Mexico’s Army and Air Force Manual (2009), in a section on the 1949 Geneva Convention III, states: “Judicial procedure must be regular, that is, it must include at least the following guarantees: the accused must be immediately informed of the particulars of the offence he is alleged to have committed”. 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 191.
In a section on the obligations of the occupying power under the 1949 Geneva Convention IV, the manual also states:
C. Judicial procedure must be regular, that is, it must include at least the following guarantees:
a. the accused must be immediately informed of the particulars of the offence he is alleged to have committed. 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 238(C)(a).