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Syrian Arab Republic
Practice Relating to Rule 15. The Principle of Precautions in Attack
Section A. Constant care to spare the civilian population, civilians and civilian objects
The Report on the Practice of the Syrian Arab Republic asserts that the Syrian Arab Republic considers Article 57 of the 1977 Additional Protocol I to be part of customary international law. 
Report on the Practice of the Syrian Arab Republic, 1997, Chapter 1.6.