Règle correspondante
Peru
Practice Relating to Rule 15. The Principle of Precautions in Attack
Section B. Avoidance or minimization of incidental damage
Peru’s IHL Manual (2004) states: “All feasible precautions must be taken in the conduct of hostilities to avoid collateral damage.” 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 17.
The manual also states:
Every effort must be made at all times to protect the civilian population and individual civilians and preserve civilian property.
This essentially involves avoiding or at least minimizing civilian casualties and damage to civilian property, taking into account populated areas, possible locations for shelters and the need to move important civilian authorities. 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 27.a.(3).
The manual further states: “The direction and time of the attack should be chosen with a view to minimizing the danger to civilians and civilian property.” 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 29.o.
Peru’s IHL and Human Rights Manual (2010) states:
(8) … The commander assigned to the mission must take the precautions required to ensure respect for International Humanitarian Law.
(9) Before taking the final decision, the commander must assess the options resulting from his analysis.
He must then balance the following factors:
(a) Obstacles to the mission.
(b) Precautions required under International Humanitarian Law.
(c) The estimated cost of the planned operation (for example, expected casualties amongst his own armed forces and civilian casualties and material damage in relation to the military advantage that can be expected to be gained).
The commander shall take the decision which results in the least danger for civilians and civilian objects (for example, more movement and manoeuvring and less fire, action that involves less risk for the civilian environment) and is in compliance with International Humanitarian Law. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 25(a)(9), p. 224; see also § 35, p. 241.
The manual further states:
When the tactical situation permits, commanders shall provide civilian authorities with information on the likely course of military operations and the resulting risks for the civilian population and civilian objects. Such information shall at least include recommendations for specific action and/or behaviour (for example, to take shelter or stay away from certain areas or routes used by the Armed Forces). 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No.. 049-2010/DE/VPD, Lima, 21 May 2010, § 25(a)(12), p. 227.
The manual also states: “All feasible precautions must be taken in the conduct of hostilities to avoid collateral damage.” 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 18, p. 224.
The manual further states:
b. Those who plan or take decisions on an attack must:
(2) Take all feasible precautions in the selection of weapons and tactics in order to avoid or at any rate minimize the number of deaths and injuries amongst the civilian population and damage to civilian objects. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 30(a)(2), p. 242.
The manual also states:
One must always endeavour to protect the civilian population and individual civilians, and to preserve civilian property. This essentially involves avoiding and at least minimizing the number of civilian victims and damage to civilian objects, taking into account populated areas, possible locations for shelters, opportunities of seeking shelter, and the large-scale displacement of civilian persons. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 28(a)(3), p. 237.
The manual further states: “The direction and time of the attack should be chosen with a view to minimizing the danger to civilians and civilian property.” 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 30(o), p. 244.
The manual also provides: “The obligation to take precautionary action falls primarily to the civilian authorities of the attacking State. Yet it only arises at the time of planning and resource allocation, for example regarding the placement of military installations.” 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 31(b), p. 245.