Citizenship Law refers to the legal framework that determines how individuals acquire, maintain, or lose citizenship in a country. This law outlines the criteria for naturalization, which is the process by which a non-citizen can become a citizen, often requiring residency, language proficiency, and knowledge of the country's history and government. Additionally, Citizenship Law addresses issues such as dual citizenship, which allows individuals to hold citizenship in more than one country, and the rights and responsibilities of citizens. These laws vary significantly from one country to another, reflecting each nation's policies and values regarding citizenship.