Umbrella clause
Arbitrary, unreasonable and/or discriminatory measures
http://elperiodicodelaenergia.com/los-inversores-internacionales-reclaman-7-566-millones-a-espana-por-el-hachazo-a-las-renovables/
https://www.iareporter.com/articles/as-another-spain-award-looms-four-more-previously-confidential-renewables-cases-surface-potential-liability-for-all-pending-claims-now-exceeds-9-5-billion/ (requires subscription)
https://www.ecestaticos.com/file/d88ce7a07265dbf8d809b453b848f239/1514204320-186-881-tribunals-arbitratge.pdf
www.idae.es/file/12971/download?token=QCXFtEkz