Russian citizenship law details the conditions by which a person holds citizenship of Russia. The primary law governing citizenship requirements is the federal law "On Citizenship of the Russian Federation", which came into force on 1 July 2002. Any person born in Russia to at least one Russian parent, or born overseas to two Russian parents, receives Russian citizenship at birth. Foreign nationals may become citizens by admission after meeting a minimum residence requirement (usually five years), proving a legal source of income, and demonstrating proficiency in the Russian language.