National treatment
Most-favoured nation treatment
Umbrella clause
Direct expropriation
Other
http://www.baltic-course.com/eng/markets_and_companies/?doc=141018
https://www.aripaev.ee/uudised/2018/05/04/lennusadama-aferist-nouab-riigilt-miljoneid
https://www.iareporter.com/articles/baltic-claims-round-up-simma-chosen-to-chair-uncitral-bit-case-eu-commission-is-permitted-to-weigh-in-with-achmea-views-in-a-case-and-ad-hoc-committee-has-been-selected-to-hear-an-annulment-applica/ (requires subscription)