Related Rule
Practice Relating to Rule 10. Civilian Objects’ Loss of Protection from Attack
In a military communiqué issued in 1973, Egypt stated that it condemned attacks against civilian objects, unless such objects were used in military operations. 
Egypt, Military Communiqué No. 18, 8 October 1973.
Upon signature of the 1998 ICC Statute, Egypt declared:
Civilian objects [referred to in Article 8, paragraph 2(b) of the Statute] must be defined and dealt with in accordance with the provisions of [the 1977 Additional Protocol I] and, in particular, article 52 thereof. In case of doubt, the object shall be considered to be civilian. 
Egypt, Declarations made upon signature of the 1998 ICC Statute, 26 December 2000, § 4(b).