38Similarly, 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 (judgment of 6 March 2003, Kaba, C‑466/00, EU:C:2003:127, paragraph 39 and the case-law cited). A national court or tribunal of last instance must make such a reference when it encounters difficulties in understanding the scope of the judgment of the Court.
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