Most-favoured nation treatment
Fair and equitable treatment/Minimum standard of treatment, including denial of justice claims
Full protection and security, or similar
Arbitrary, unreasonable and/or discriminatory measures
Other
https://www.iareporter.com/arbitration-cases/contreras-v-costa-rica-2/ (requires subscription)
https://www.iareporter.com/articles/telecoms-investor-refiles-icsid-af-rules-arbitration-against-costa-rica/ (requires subscription)