This is big news and the Statement of Claim is very interesting indeed. It has been brought by Paul Hellyer, P.C. et al. The lawyer is Rocco Galati, who successfully challenged the former Government's attempt to appoint the Honourable Marc Nadon to the Surpeme Court of Canada.
This comes at the same time as Wallonia has apparently secured an agreement in the US to put the #ISDS provisions of CETA to the test in the ECJ, where approval is far from certain.
As the Guardian reports:
One concession he won means Belgium would be able to go to the European court of justice to determine whether the new investor-state special tribunals are compatible with EU law. The four-page document also contains a guarantee that the Belgian government will assess the socio-economic and environmental impact of Ceta.HK