| ARTICLE 1 1. The Czech Republic, the Republic of Estonia, the Republic of Cyprus, the Republic of Latvia, the Republic of Lithuania, the Republic of Hungary, the Republic of Malta, the Republic of Poland, the Republic of Slovenia and the Slovak Republic hereby become members of the European Union and Parties to the Treaties on which the Union is founded as amended or supplemented. 2. The conditions of admission and the adjustments to the Treaties on which the Union is founded, entailed by such admission, are set out in the Act annexed to this Treaty. The provisions of that Act shall form an integral part of this Treaty. 3. The provisions concerning the rights and obligations of the Member States and the powers and jurisdiction of the institutions of the Union as set out in the Treaties referred to in paragraph 1 shall apply in respect of this Treaty. See also: Treaty of Lisbon, which Poland also signed. Specifically, Declaration 17: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A... 17. Declaration concerning primacy The Conference recalls that, in accordance with well settled case law of the Court of Justice of the European Union, the Treaties and the law adopted by the Union on the basis of the Treaties have primacy over the law of Member States, under the conditions laid down by the said case law. Edit: You may want to also have a look here: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=LEGISSUM... "According to the precedence principle, European law is superior to the national laws of Member States. The precedence principle applies to all European acts with a binding force. Therefore, Member States may not apply a national rule which contradicts to European law. The precedence principle guarantees the superiority of European law over national laws. It is a fundamental principle of European law. As with the direct effect principle, it is not inscribed in the Treaties, but has been enshrined by the Court of Justice of the European Union (CJEU)." |
From the treaty: https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CEL...
"To the extent that a provision of the Charter refers to national laws and practices, it shall only apply to Poland or the United Kingdom to the extent that the rights or principles that it contains are recognised in the law or practices of Poland or of the United Kingdom."
Rather, it is an agreement in which national parliaments agree to pass national laws in harmony with certain EU laws, or face some penalties. The reason why national parliaments need to do that is because national laws and national constitutions as interpreted by national judges remain the supreme law of the land, and so this treaty was required in order to provide a framework to urge members states to harmonize or give up various EU funding perks.
Look, I get that a lot of people want a Federal Europe, but you can't get there by pretending you've already arrived and being outraged at those who point out you haven't. The EU as presently constituted is basically the articles of confederation, where states need to pass local versions of EU laws, rather than something like a true Federal Europe.