Related Rule
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section C. Attacks against civilian objects in general
Colombia’s Circular on Fundamental Rules of IHL (1992) provides: “Neither the civilian population as such nor civilian objects may be subjected to attacks.” 
Colombia, Transcripción Normas Fundamentales del Derecho Humanitario Aplicables en los Conflictos Armados, Circular No. 033/DIPL-SERPO-526, Policía Nacional, Dirección General, Santafé de Bogotá, 14 May 1992, § 7.
The Report on the Practice of Colombia refers to a decision of the Council of State in 1994 which considered the guerrilla attack on the Palace of Justice as a terrorist attack directed against a civilian object. 
Report on the Practice of Colombia, 1998, Chapter 1.3, referring to Council of State, Administrative Case No. 9276, Judgment, 19 August 1994.