Соответствующая норма
Mexico
Practice Relating to Rule 128. Release and Return of Persons Deprived of Their Liberty
Section D. Voluntary nature of return
Mexico’s Army and Air Force Manual (2009) states:
193. The [1949 Geneva] Convention [III] provides for direct repatriation (return to country of origin) and hospitalization in a neutral country:
C. no sick or injured prisoner of war may be repatriated against his will during hostilities. 
Mexico, Manual de Derecho Internacional Humanitario para el Ejército y la Fuerza Área Mexicanos, Ministry of National Defence, June 2009, § 193(C).