Related Rule
Peru
Practice Relating to Rule 8. Definition of Military Objectives
Section G. Economic installations
Peru’s IHL Manual (2004) states: “[Air] bombardment is legitimate only when directed exclusively against the following objectives: … manufacturing plants constituting important and well-known centres for the production of arms, ammunition or characterized military supplies.” 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 172.d.
Peru’s IHL and Human Rights Manual (2010) states: “[Air] bombardment is only legitimate when it is exclusively directed against the following objectives: … factories constituting important and well-known centres for the production of weapons, ammunition or supplies that are clearly of a military character”. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 163(c), p. 343.