Règle correspondante
Colombia
Practice Relating to Rule 22. The Principle of Precautions against the Effects of Attacks
Colombia’s Operational Law Manual (2009) states:
4. Rules for the conduct of hostilities
b. Precautions in attack and against the effects of attacks
The principle of precaution requires that military operations be carried out with constant care to spare the civilian population and civilian objects. The following rules, which must be taken into account when planning a military operation, derive from this principle:
- Take all feasible precautions to protect the civilian population and civilian objects from the effects of attacks[.] 
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, pp. 40 and 52–53.
[footnote in original omitted]
The manual also states:
3. Minimum contents of operational orders
c. Execution
The description of the execution of the operation must include the Commander’s operational concept. Within these sections, the following contents, depending on the operation[,] … should be included:
(i) For operations in a hostilities scenario:
If the operation is carried out in a situation of hostilities, i.e. if the planning can be done within the IHL framework, the section on execution must also include:
- Precautions in attack and against the effects of the attack: take all necessary precautionary measures in the attack … taking into account the provisions of Chapter II, number 4(b) of this Manual. 
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, pp. 100–102.
In 2007, in the Constitutional Case No. C-291/07, the Plenary Chamber of Colombia’s Constitutional Court stated:
[T]he essential principles of international humanitarian law have acquired ius cogens status, based on the fact that the international community as a whole has recognised their peremptory and imperative nature … Among the essential principles of international humanitarian law with ius cogens status applicable in internal armed conflicts … [is] the precautionary principle. 
Colombia, Constitutional Court, Constitutional Case No. C-291/07, Judgment of 25 April 2007, p. 70.
The Court further held:
The precautionary principle is the cornerstone of a number of specific rules which are considered to have attained customary status and to be applicable in internal armed conflicts … Among these rules is … the obligation of the parties to a conflict … to protect the civilian population against the effects of attacks. 
Colombia, Constitutional Court, Constitutional Case No. C-291/07, Judgment of 25 April 2007, p. 99.
[footnote in original omitted]