Disputes resulting from a contract concluded between a private party and a beneficiary State of the European Development Fund are settled under the EDF arbitration Rules as adopted in 1990 by the ACPEU Council of Ministers. When adopted, drafters of the EDF arbitration Rules were mainly influenced by the then UNCITRAL Rules which were adapted to the African Caribbean Pacific context. Further practice of the EDF arbitration Rules revealed that some of its provisions deserve clarifications or may affect parties’ legal certainty. Given such weaknesses, the ACP-EU Council of Ministers should therefore take the opportunity of the still recent evolvements of some relevant arbitration rules (e.g. ICC and UNCITRAL) for considering a modernisation of the EDF arbitration Rules.