Syria air strikes: Were they legal?
The justifications put forward by the US, UK and France for the air strikes in Syria have focused on the need to maintain the international prohibition against the use of chemical weapons, to degrade President Assad’s chemical weapons arsenal and to deter further chemical attacks against civilians in Syria.
Prime Minister Theresa May argued that the UK has always stood up for the defence of global rules and standards in the national interest of the UK and of the organised international community as a whole.
However, in its formal legal defence of the operation issued some time later, the UK government rather emphasises the need to protect the population of Syriafrom further harm.
Legally, the claim to enforce international law on chemical weapons by violent means would return the world to the era before the advent of the UN Charter. The Charter allows states to use force in self-defence and, arguably, for the protection of populations threatened by extermination at the hands of their own government. The use of force for broader purposes of maintaining international security is also possible. However, such action is subject to the requirement of a mandate from the UN Security Council.
This arrangement tries to balance the need of states to preserve their security in the face of an actual or imminent attack through self-defence when strictly necessary with the need to ensure that force cannot be used as a routine tool of international politics. Hence, international law since 1945 precludes military strikes in retaliation – to teach other states a lesson, as it were – or by way of reprisal. Reprisals are acts that are in principle unlawful, but they can be excused because they aim to force a state back into compliance with its international obligations.
Hence, in 1981 Israel was condemned by the UN Security Council when it attacked the Osirak nuclear reactor in Iraq. Israel had argued that it might contribute to the production of weapons of mass destruction in the future. A US attack against an alleged chemical weapons facility in Sudan in 1998 in response to US embassy bombings in Kenya and Tanzania was also criticised.
In this instance, the three states mounting the air strikes have taken it upon themselves to force Syria into compliance with its obligations under the Chemical Weapons Convention. Syria joined the Convention in 2013 as part of the diplomatic settlement that followed the failure of the UK, and the US, to go through with threatened air attacks after gruesome chemical attacks in Eastern Ghouta. The Convention prohibits the production, possession and use of chemical weapons. No fewer than 192 states have signed.
Syria was also subjected to additional duties contained in mandatory Security Council resolution 2118, reinforcing these obligations and providing for the destruction of its chemical weapons stockpile. In an impressive example of international co-operation, also involving Russia, this was largely achieved a year later, by September 2014.
However, since then, there have been some 40 recorded instances of alleged chemical weapons use in Syria. The Organization for the Prohibition of Chemical Weapons (OPCW) has the ability to dispatch fact-finding missions to determine whether such weapons have actually been used.
A special joint mechanism was set up by the OPCW and the Security Council with a mandate to assign responsibility for such uses. However, after the mechanism pointed the finger at the Assad government last year, Russia vetoed its renewal.
An attempt to establish a new mechanism empowered to determine responsibility for the latest use of chemical weapons in Douma failed this week, again due to a Russian veto in the Security Council. Russia’s own proposed investigatory mechanism, which was opposed by the Western states and others, would have lacked that power.
The three states intervening in Syria now argue that there was no prospect of obtaining a mandate from the Council to confront chemical weapons use by Syria. In striking Syria, they claim to have fulfilled an international public order function of defending the credibility of the prohibition of the use of chemical weapons in general terms, and enforcing Syria’s obligations in particular.
This argument is somewhat reminiscent of the 2003 invasion of Iraq, supposedly to enforce Baghdad’s disarmament obligations imposed by the Security Council in the absence of clear Security Council authorisation. Moreover, in April of last year, President Trump launched 59 cruise missiles against the Syrian air-base at Shayrat. It was claimed that the installation had been involved in a chemical attack in the town of Khan Sheikhun, again to restrain further chemical weapons use.
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