Related Rule
Practice Relating to Rule 21. Target Selection
In 2007, in the Constitutional Case No. C-291/07, the Plenary Chamber of Colombia’s Constitutional Court stated:
The precautionary principle is the cornerstone of a number of specific rules which are all considered to have attained customary status and to be applicable in internal armed conflicts … Among these rules is … the obligation to select the objective of an attack which may be expected to cause the least danger to civilian lives and to civilian objects when a choice is possible between several military objectives for obtaining a similar military advantage. 
Colombia, Constitutional Court, Constitutional Case No. C-291/07, Judgment of 25 April 2007, p. 99.
[footnote in original omitted]