Robuta

https://kpmg.com/mt/en/home/industries/shipping-and-yachting/malta-tonnage-tax-rules.html
European Commission Approves Malta Tonnage Tax Rules
tonnage taxmaltaruleskpmg
https://www.gov.uk/hmrc-internal-manuals/tonnage-tax-manual
A definition of tonnage tax, which types of ship qualify, how the tax is worked out and the rules it follows.
tonnage taxgov ukmanualhmrcinternal
https://www.gov.uk/hmrc-internal-manuals/tonnage-tax-manual/ttm01010
tonnage taxintroductionbriefguidehmrc
https://kpmg.com/ch/en/insights/taxes/swiss-tonnage-tax-legislative-process.html
The National Council approved the draft of the Federal Act on the tonnage tax to ensure the competitiveness of Switzerland as a business location.
tonnage taxlegislative processswisscontinues