I. An introduction -- Understanding the International Labour Organization (ILO) -- The ill-founded challenge to the right to strike in 2012 -- II. A rebuttal : on the question of mandates -- The ILO committee of experts has a mandate to 'interpret' ILO conventions, not the constituents -- III. A rebuttal : the indisputable case for the right to strike -- The rules of interpretation : the Vienna Convention on the Law of Treaties (VCLT) -- The ordinary meaning of Convention 87 supports the existence of a right to strike -- The object and purpose of Convention 87 supports the existence of a right to strike -- The subsequent agreement and practice between the parties concerning Convention 87 supports the existence of a right to strike : ILO jurisprudence -- The subsequent agreement and practice between the parties concerning Convention 87 supports the existence of a right to strike : beyond the ILO -- Other methods under Article 31 of the Vienna Convention on the Law of Treaties (VCLT) support the existence of a right to strike -- Though unwarranted, Article 32 of the Vienna Convention on the Law of Treaties (VCLT) also supports the existence of the right to strike -- The right to strike is recognised as customary in international law -- IV. Where to from here? -- Settling the dispute : the International Court of Justice? -- The aftermath -- Conclusion.