International organization — European Coal and Steel Community — Compensation payments to Belgianmines — Whether threat to reduce or withdraw compensation amounts to discrimination forbidden by Treaty.

International organization — European Coal and Steel Community — High Authority of — Competence of — Whether competent to fix selling price of Belgian coal — Absence of express power in Treaty — Whether competence may be implied — Convention containing Transitional Provisions, Section 26 — Détournement de pouvoir — Relevance of wrong motives — Primary and subsidiary aims — Effect of error.