Ustawa z dnia 20 kwietnia 2004 r. o zmianie i uchyleniu niektórych ustaw w związku z uzyskaniem przez Rzeczpospolitą Polską członkostwa w Unii Europejskiej

This legislative act consists of a series of amendments to various Polish laws to align the national legal system with European Union standards. It was necessary to ensure that domestic regulations were compatible with the legal obligations and frameworks required for Poland's membership in the EU. The changes affect various sectors of Polish law and administration, ensuring that national legislation respects EU treaties and institutional requirements. This transition was essential for the smooth integration of Poland into the European single market and legal community.