Laws governing citizenship, foreigners, and passports regulate who can enter, stay, and become a citizen of a country, typically through acts like India’s Citizenship Act, 1955, and the new Immigration & Foreigners Act, 2025, which require valid passports/visas for entry/exit, define illegal migrants (those without documents or overstaying), and empower government control over immigration, while separate Passport Acts (like India’s 1967 Act) govern travel documents. These laws aim to consolidate immigration rules, define citizenship pathways (birth, parentage, residence), and establish penalties for violations, balancing national security with regulated entry.