39It should be noted at the outset that the authority of a preliminary ruling does not preclude the national court or tribunal to which it is addressed from taking the view that it is necessary to make a further reference to the Court before giving judgment in the main proceedings. Such a procedure may be justified when the national court or tribunal encounters difficulties in understanding or applying the judgment, when it refers a fresh question of law to the Court, or again when it submits new considerations which might lead the Court to give a different answer to a question submitted earlier (order in Case 69/85 Wünsche [1986] ECR 947, paragraph 15).
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