Fair and equitable treatment/Minimum standard of treatment, including denial of justice claims
Full protection and security, or similar
Customary rules of international law
Arbitrary, unreasonable and/or discriminatory measures
http://globalarbitrationreview.com/news/article/20072/uzbekistan-faces-second-icsid-claim/ (requires subscription)
http://globalarbitrationreview.com/news/article/32072/uzbek-claim-dismissed-corruption/ (requires subscription)
http://www.cisarbitration.com/2013/12/16/metal-tech-v-uzbekistan-no-jurisdiction-because-of-corruption/