相关规则
Mexico
Practice Relating to Rule 10. Civilian Objects’ Loss of Protection from Attack
Section B. Situations of doubt as to the character of an object
Mexico’s IHL Guidelines (2009) states: “In case of doubt, an object should be considered to be civilian.” 
Mexico, Cartilla de Derecho Internacional Humanitario, Ministry of National Defence, 2009, § 2.
At the CDDH, Mexico stated that it believed Article 47 of the draft Additional Protocol I (now Article 52) to be so essential that it “cannot be the subject of any reservations whatsoever since these would be inconsistent with the aim and purpose of Protocol I and undermine its basis”. 
Mexico, Statement at the CDDH, Official Records, Vol. VI, CDDH/SR.41, 26 May 1977, p. 193.