4B1 ; 4B2 [Scope of Convention (issues excluded): validity under domestic law (validity of retention of title clause); Effect of contract on property];

7B1 ; 7C231 [Interpretation of Convention (materials for interpretation): international case law ("courts should consider the decisions issued by foreign courts on the CISG") and scholarly studies; Gap-filling (gap-filling by domestic law): recourse to domestic law selected by Private International Law];

81C3 [Effect of avoidance on obligations (avoidance for non-payment: right to return of goods): right not available where third-party rights intervene and domestic law does not allow]