Fair and equitable treatment/Minimum standard of treatment, including denial of justice claims
Full protection and security, or similar
National treatment
http://globalarbitrationreview.com/news/article/29426/oman-facing-first-icsid-claim/ (requires subscription)
http://globalarbitrationreview.com/news/article/30037/us-limestone-investor-sues-oman/ (requires subscription)
http://www.iareporter.com/articles/in-rejecting-claims-of-u-s-investor-against-oman-arbitrators-reckon-with-free-trade-agreements-narrow-definition-of-what-constitutes-a-state-enterprise/ (requires subscription)