相关规则
Mexico
Practice Relating to Rule 100. Fair Trial Guarantees
Section C. Presumption of innocence
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 presumed innocent.” 
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:
c. the accused must be presumed innocent. 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 238(C)(c).