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Mexico
Practice Relating to Rule 104. Respect for Convictions and Religious Practices
Mexico’s Army and Air Force Manual (2009) states:
The States party to the [1949] Geneva Conventions undertake to:
B. respect human beings and their person, their honour, their dignity, their family rights and their religious and moral convictions. 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 80(B); see also § 104.
In a section on the 1949 Geneva Convention III, the manual also states: “Prisoners of war … must be allowed to practise their religion.” 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 378(A).
In a section on the 1949 Geneva Convention IV, the manual states: “The occupying power must permit ministers of religion to give spiritual assistance to the members of their religious communities.” 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 234(G).
In a section on the 1949 Geneva Convention IV, the manual further states: “All persons are entitled, in all circumstances, to respect for … their religious convictions and practices and their manners and customs.” 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 380.