Condemning in the strongest possible terms the fact that chemical weapons have been used since 2012 in the Syrian Arab Republic, including as reported by the Organisation for the Prohibition of Chemical Weapons-United Nations Joint Investigative Mechanism in its reports of 2016 and 2017, 32 concluding that the Syrian Arab Armed Forces were responsible for the attacks which released toxic substances in Talmenes in 2014 and in Sarmin and Qmenas in 2015, that ISIL (also known as Da’esh) used sulfur mustard in Marea in 2015 and in Umm Hawsh in 2016 and that the Syrian Arab Republic was responsible for the release of sarin at Khan Shaykhun in 2017, and accordingly noting with great concern the reports of the fact -finding mission of the Organisation for the Prohibition of Chemical Weapons regarding incidents in Ltamenah 33 and Saraqib, as well as the final report regarding the incident involving alleged use of toxic chemicals as a weapon in Duma, 35 which concluded that there were reasonable grounds to believe that the use of a toxic chemical as a weapon had taken place, and demanding that the perpetrators immediately desist from any further use of chemical weapons,