The juridical foundations of investment treaty arbitration -- Applicable laws -- Taxonomy of preliminary issues relating to jurisdiction and admissibility in investment treaty arbitration -- Consent to the arbitration of investment disputes -- Investment -- Jurisdiction ratione materiae -- Jurisdiction ratione personae -- Jurisdiction ratione temporis -- The obligation to accord most-favoured-nation treatment and the jurisdiction of an investment treaty tribunal -- Admissibility : contractual choice of forum -- Admissibility : shareholder claims -- Admissibility : dispositions relating to the legal and beneficial ownership of the investment -- Admissability : denial of benefits