The current Citizenship Law replaced the first law in 2001 and has undergone several amendments, the most recent of which occurred in 2021. In 2002, Ukraine acceded to the 1967 Protocol to the 1951 Refugee Convention, then to the Convention itself. Ukraine signed the European Convention on Nationality in 2003 and ratified it in 2006. That year, Ukraine also became the first country to sign the Council of Europe Convention on the Avoidance of Statelessness in Relation to State Succession, but never ratified it. The country acceded to the Convention Relating to the Status of Stateless Persons and the Convention on the Reduction of Statelessness in 2013.