Règle correspondante
Practice Relating to Rule 9. Definition of Civilian Objects
Colombia’s Instructors’ Manual (1999) states:
A civilian object … is every object that is not a military objective. … In sum, it may be said that civilian objects are those objects which by their nature, location, purpose or use do not make an effective contribution to military action and whose total or partial destruction, capture or neutralization, in the circumstances ruling at the time, do not offer a definite military advantage. 
Colombia, Derechos Humanos & Derecho Internacional Humanitario – Manual de Instrucción de la Guía de Conducta para el Soldado e Infante de Marina, Ministerio de Defensa Nacional, Oficina de Derechos Humanos, Fuerzas Militares de Colombia, Santafé de Bogotá, 1999, pp. 16–17.
[emphasis in original]
Colombia’s Operational Law Manual (2009) states: “In the case of objects, civilian objects are those that are not military objectives.” 
Colombia, Manual de Derecho Operacional Manual FF.MM. 3-41 Público, Primera Edición 2009, Comando General de las Fuerzas Militares, aprobado por el Comandante General de las Fuerzas Armadas por Disposición Número 056, 7 December 2009, p. 40.
(footnote in original omitted)
In 2007, in the Constitutional Case No. C-291/07, the Plenary Chamber of Colombia’s Constitutional Court stated: “Civilian objects shall be ‘any objects that cannot be legitimately considered a military objective’ [quoting Prosecutor v. Tihomir Blaškić, Judgement, Trial Chamber I, 3 March 2000, Case No. IT-95-14-T].” 
Colombia, Constitutional Court, Constitutional Case No. C-291/07, Judgment of 25 April 2007, p. 94.
In 2010, in the El Iguano case, the Justice and Peace Chamber of Colombia’s High District Court of Bogotá convicted a member of the paramilitary group Autodefensas Unidas de Colombia (United Self-Defence Forces of Colombia) of several crimes committed against the civilian population. The Court stated:
234. The rules prohibiting the destruction and appropriation of protected objects derive from the principles of proportionality and distinction enshrined in IHL and according to which the opposing parties cannot choose whatever means of warfare they might wish nor carry out or order indiscriminate attacks. The principle of distinction imposes on the parties to a conflict the obligation to distinguish between combatants and non-combatants and between civilian objects and military objectives. In this regard, the Constitutional Court stated:
235. “The principle of distinction, one of the cornerstones of international humanitarian law, flows directly from the obligation to protect the civilian population from the effects of war, as in times of armed conflict it is only acceptable to weaken the enemy’s military potential. This principle obliges the parties to a conflict to make an effort to distinguish between military objectives and civilian objects. Civilian objects are any objects that cannot be legitimately considered as military objectives[.]” 
Colombia, High District Court of Bogotá, El Iguano case, Judgment, 2 December 2010, §§ 234–235.
[footnote in original omitted]