National treatment
https://www.iareporter.com/arbitration-cases/finley-resources-et-al-v-mexico/ (requires subscription)
https://globalarbitrationreview.com/us-oil-and-gas-investors-bring-claim-against-mexico (requires subscription)
http://web.archive.org/web/20220126163441/https://www.gob.mx/cms/uploads/attachment/file/675943/Ficha_Finley_Resources_Inc._y_otros_c._los_Estados_Unidos_Mexicanos.pdf