Fair and equitable treatment/Minimum standard of treatment, including denial of justice claims
Full protection and security, or similar
http://globalarbitrationreview.com/news/article/33186/third-argentine-bond-case-gets-go-ahead/ (requires subscription)
http://www.iareporter.com/articles/argentina-faces-a-third-treaty-claim-by-hold-out-bond-holders-experts-differ-as-to-prospects/ (requires subscription)