{"id":12966,"date":"2025-12-16T11:33:46","date_gmt":"2025-12-16T11:33:46","guid":{"rendered":"https:\/\/www.legalserviceindia.com\/Legal-Articles\/?p=12966"},"modified":"2025-12-16T11:43:26","modified_gmt":"2025-12-16T11:43:26","slug":"essentials-of-european-union-law-supremacy-sources-and-integration","status":"publish","type":"post","link":"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/","title":{"rendered":"Essentials of European Union Law: Supremacy, Sources, and Integration"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"eu-law-overview\"><span class=\"ez-toc-section\" id=\"European_Union_EU_Law_An_Overview\"><\/span>European Union (EU) Law: An Overview<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The European Union (EU) law is a special kind of legal system that applies to all 27 countries in the EU. Unlike regular national laws, it has higher authority in certain areas, meaning it can override a country&#8217;s own laws when needed. This helps keep rules consistent and brings the different countries closer together, even though they have their own unique legal backgrounds.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0c0c0c;color:#0c0c0c\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0c0c0c;color:#0c0c0c\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#European_Union_EU_Law_An_Overview\" >European Union (EU) Law: An Overview<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Supremacy_of_EU_Law_Over_National_Law\" >Supremacy of EU Law Over National Law<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Costa_v_ENEL_1964_%E2%80%93_Why_It_Matters\" >Costa v. ENEL (1964) \u2013 Why It Matters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Sources_of_EU_Law\" >Sources of EU Law<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Hierarchy_of_EU_Law\" >Hierarchy of EU Law<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Summary_of_the_Hierarchy_of_EU_Legal_Sources\" >Summary of the Hierarchy of EU Legal Sources<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Fundamental_Principles\" >Fundamental Principles<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Policy_Areas_Covered\" >Policy Areas Covered<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Institutions_of_EU_Law\" >Institutions of EU Law<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Impact_on_Member_States\" >Impact on Member States<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.legalserviceindia.com\/Legal-Articles\/essentials-of-european-union-law-supremacy-sources-and-integration\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n\n<h3 class=\"wp-block-heading\" id=\"supremacy-of-eu-law\"><span class=\"ez-toc-section\" id=\"Supremacy_of_EU_Law_Over_National_Law\"><\/span>Supremacy of EU Law Over National Law<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">EU law has higher authority than national laws in areas where the EU makes the rules, such as free trade, environmental protection, workers&#8217; rights like equal pay, and consumer safety\u2014this means countries cannot ban imports from other EU members to protect their own businesses, must follow stricter EU pollution limits even if their own rules are weaker, apply EU anti-discrimination protections over looser national ones, and enforce EU product safety standards directly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"costa-v-enel-1964\"><span class=\"ez-toc-section\" id=\"Costa_v_ENEL_1964_%E2%80%93_Why_It_Matters\"><\/span>Costa v. ENEL (1964) \u2013 Why It Matters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In 1964, an Italian man named Costa refused to pay his electricity bill to ENEL, a new state-owned company created after Italy nationalised electricity. He argued this broke EU rules on fair competition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The European Court of Justice (ECJ) decided that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>EU law is supreme over national law.<\/li>\n\n\n\n<li>It comes from a special legal system agreed by all member states.<\/li>\n\n\n\n<li>National courts must apply EU law uniformly, even if it conflicts with local laws.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This case became the foundation of EU supremacy, showing that EU rules always win over national ones in the 27 member states.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sources-of-eu-law\"><span class=\"ez-toc-section\" id=\"Sources_of_EU_Law\"><\/span>Sources of EU Law<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">EU law comes from three main sources:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Source<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Primary Legislation<\/td><td>The big treaties like the Treaty on European Union (TEU) and the Treaty on the Functioning of the European Union (TFEU) that act as the EU\u2019s constitution.<\/td><\/tr><tr><td>Secondary Legislation<\/td><td>Includes regulations that apply directly in all countries, directives that set goals for countries to achieve in their own way, decisions that bind specific people or states, and non-binding recommendations or opinions.<\/td><\/tr><tr><td>Supplementary Law<\/td><td>General legal principles, international agreements the EU makes, and rulings of the Court of Justice of the EU (CJEU) that explain and enforce these rules.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"hierarchy-of-eu-law\"><span class=\"ez-toc-section\" id=\"Hierarchy_of_EU_Law\"><\/span>Hierarchy of EU Law<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Treaties are supreme and form the constitutional backbone.<\/li>\n\n\n\n<li>Regulations are directly applicable in all member states without national implementation.<\/li>\n\n\n\n<li>Directives bind member states to achieve certain results but allow flexibility in implementation.<\/li>\n\n\n\n<li>Decisions are binding on those to whom they are addressed.<\/li>\n\n\n\n<li>Case Law of the CJEU ensures uniform interpretation and supremacy of EU law over national law.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"hierarchy-summary-table\"><span class=\"ez-toc-section\" id=\"Summary_of_the_Hierarchy_of_EU_Legal_Sources\"><\/span>Summary of the Hierarchy of EU Legal Sources<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Source of EU Law<\/th><th>Nature and Effect<\/th><\/tr><\/thead><tbody><tr><td>Treaties<\/td><td>Supreme law forming the constitutional backbone of the EU<\/td><\/tr><tr><td>Regulations<\/td><td>Directly applicable in all member states<\/td><\/tr><tr><td>Directives<\/td><td>Binding as to results, flexible as to implementation<\/td><\/tr><tr><td>Decisions<\/td><td>Binding on those to whom they are addressed<\/td><\/tr><tr><td>Case Law of the CJEU<\/td><td>Ensures uniform interpretation and supremacy of EU law<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"fundamental-principles\"><span class=\"ez-toc-section\" id=\"Fundamental_Principles\"><\/span>Fundamental Principles<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Supremacy of EU Law:<\/strong> National law must yield to EU law in case of conflict.<\/li>\n\n\n\n<li><strong>Direct Effect:<\/strong> Certain EU provisions confer rights directly enforceable by individuals in national courts.<\/li>\n\n\n\n<li><strong>Subsidiarity and Proportionality:<\/strong> EU acts only where objectives cannot be sufficiently achieved by member states, and measures must not exceed what is necessary.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"policy-areas-covered\"><span class=\"ez-toc-section\" id=\"Policy_Areas_Covered\"><\/span>Policy Areas Covered<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">EU law governs diverse areas, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Internal Market:<\/strong> Free movement of goods, services, capital, and persons.<\/li>\n\n\n\n<li><strong>Competition Law:<\/strong> Prevents monopolies and ensures fair competition.<\/li>\n\n\n\n<li><strong>Environmental Law:<\/strong> Sets standards for sustainability and climate action.<\/li>\n\n\n\n<li><strong>Social Policy:<\/strong> Protects workers\u2019 rights, equality, and social justice.<\/li>\n\n\n\n<li><strong>Justice and Home Affairs:<\/strong> Cooperation on asylum, immigration, and criminal law.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"institutions-of-eu-law\"><span class=\"ez-toc-section\" id=\"Institutions_of_EU_Law\"><\/span>Institutions of EU Law<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>European Parliament:<\/strong> Represents citizens and co-legislates.<\/li>\n\n\n\n<li><strong>Council of the European Union:<\/strong> Represents member states\u2019 governments.<\/li>\n\n\n\n<li><strong>European Commission:<\/strong> Proposes legislation and ensures compliance.<\/li>\n\n\n\n<li><strong>Court of Justice of the European Union (CJEU):<\/strong> Interprets EU law and ensures uniform application.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"impact-on-member-states\"><span class=\"ez-toc-section\" id=\"Impact_on_Member_States\"><\/span>Impact on Member States<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>EU law becomes part of national legal systems and is enforceable by national courts.<\/li>\n\n\n\n<li>It promotes integration, peace, and economic stability while balancing sovereignty with collective governance.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">European Union law is a unique and coherent legal system built on treaties, legislation, and judicial interpretation. Its defining principles\u2014supremacy over national law, direct effect for individuals, and wide policy coverage\u2014make it the backbone of European integration. By ensuring that EU rules apply uniformly across all member states, it strengthens the single market, protects fundamental rights, promotes fair competition, and supports cooperation in areas like environment, justice, and social policy. Through the work of institutions such as the European Parliament, Commission, Council, and the Court of Justice of the EU, this system balances national sovereignty with collective governance. In doing so, EU law not only shapes the legal and economic framework of Europe but also fosters unity, stability, and progress across the continent.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>European Union (EU) Law: An Overview The European Union (EU) law is a special kind of legal system that applies to all 27 countries in the EU. Unlike regular national laws, it has higher authority in certain areas, meaning it can override a country&#8217;s own laws when needed. This helps keep rules consistent and brings<\/p>\n","protected":false},"author":49,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"two_page_speed":[],"_jetpack_memberships_contains_paid_content":false,"_joinchat":[],"footnotes":""},"categories":[80],"tags":[355,28],"class_list":["post-12966","post","type-post","status-publish","format-standard","category-international-law","tag-international-law","tag-top-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6.1 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Essentials of European Union Law: Supremacy, Sources, and Integration - Legal Service India - Articles<\/title>\n<meta name=\"description\" content=\"European Union (EU) law explained\u2014its supremacy over national law, sources, institutions, key principles, and the landmark Costa v. 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