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Argentina
Practice Relating to Rule 100. Fair Trial Guarantees
Section J. Compelling accused persons to testify against themselves or to confess guilt
Argentina’s Law of War Manual (1969) provides: “No moral or physical pressure shall be exercised on a prisoner of war to make him confess guilt for the act of which he is accused.” 
Argentina, Leyes de Guerra, RC-46-1, Público, II Edición 1969, Ejército Argentino, Edición original aprobado por el Comandante en Jefe del Ejército, 9 May 1967, § 2.083(1).
Argentina’s Law of War Manual (1989) states that judicial proceedings must afford the guarantee that there is “no pressure on the prisoner to confess guilt”. 
Argentina, Leyes de Guerra, PC-08-01, Público, Edición 1989, Estado Mayor Conjunto de las Fuerzas Armadas, aprobado por Resolución No. 489/89 del Ministerio de Defensa, 23 April 1990, § 3.30.
With respect to occupied territories, the manual states that there shall be “no pressure in order to obtain a confession”. 
Argentina, Leyes de Guerra, PC-08-01, Público, Edición 1989, Estado Mayor Conjunto de las Fuerzas Armadas, aprobado por Resolución No. 489/89 del Ministerio de Defensa, 23 April 1990, § 5.09(3).
In the case of non-international armed conflict, the manual provides for the “absence of pressure [on the accused] to obtain a confession of guilt”. 
Argentina, Leyes de Guerra, PC-08-01, Público, Edición 1989, Estado Mayor Conjunto de las Fuerzas Armadas, aprobado por Resolución No. 489/89 del Ministerio de Defensa, 23 April 1990, § 7.10.