183Lastly, it should be noted that, under Article 2 of the Act of Accession, the provisions of the original Treaties and the acts adopted by the institutions and the European Central Bank before accession are to be binding on the new Member States and are to apply in those States under the conditions laid down in those Treaties and in the act of accession. The Court has already held that it is apparent from Articles 2 and 10 of the Act of Accession that that act is based on the principle that the provisions of EU law apply ab initio and in toto to new Member States and that derogations are allowed only on a transitional basis in so far as they are expressly provided for by transitional provisions (judgment of 21 March 2019, Commission v Poland, C‑127/17, EU:C:2019:236, paragraph 103 and the case-law cited).
15 judgesK. Lenaerts, T. von Danwitz, F. Biltgen, I. Jarukaitis, M.L. Arastey Sahún, I. Ziemele, J. Passer, O. Spineanu-Matei, M. Condinanzi, F. Schalin, A. Kumin, N. Jääskinen, D. Gratsias, Z. Csehi, B. Smulders