Règle correspondante
Peru
Practice Relating to Rule 8. Definition of Military Objectives
Section F. Lines and means of transportation
Peru’s IHL Manual (2004) states: “[Air] bombardment is legitimate only when directed exclusively against the following objectives: … lines of … transport which are used for military purposes.” 
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.
The manual also states: “Merchant ships escorted by enemy warships and civilian aircraft escorted by enemy military aircraft can be attacked.” 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 29.n.
Peru’s IHL and Human Rights Manual (2010) states: “[Air] bombardment is only legitimate when it is exclusively directed against the following objectives: … lines of … transport which are used for military purposes.” 
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.
The manual also states:
a. Enemy Merchant Ships
(1) Enemy merchant ships can only be attacked if they meet the definition of military objective.
(2) The following activities can turn an enemy merchant ship into a military objective:
(d) Navigating in convoy with warships or enemy military aircraft.
b. Enemy Civil Aircraft
(1) Enemy civil aircraft can only be attacked if it meets the definition of military objective.
(2) The following activities can turn an enemy civil aircraft into a military objective:
(d) Flying under the protection of accompanying warships or enemy military aircraft. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 121(a)(1)–(2)(d) and (b)(1)–(2)(d), p. 312.