4 | PROTECTING STATELESS PERSONS FROM ARBITRARY DETENTION IN UKRAINE LIST OF ABBREVIATIONS ACPC Administrative Court Procedure Code 1954 Convention 1954 Convention relating to the Status of Stateless Persons 1961 Convention 1961 Convention on the Reduction of Statelessness CoAO Code on Administrative Offences CoE Council of Europe CRC Convention on the Rights of the Child CTAR Centre for Temporary Accommodation of Refugees ECHR European Convention on Human Rights ECtHR European Court on Human Rights ENS European Network on Statelessness EU European Union ICCPR International Covenant on Civil and Political Rights ICESCR International Covenant on Economic, Social and Cultural Rights IOM International Organisation for Migration MDC Migrant Detention Centre NGO Non-Governmental Organisation NPM National Preventive Mechanism OHCHR Office of the High Commissioner for Human Rights Ombudsman Parliamentary Commissioner for Human Rights OPCAT Optional Protocol to the Convention Against Torture R2P/HIAS Right to Protection in partnership with HIAS SBGS State Border Guard Service of Ukraine SMSU State Migration Service of Ukraine SSU Security Service of Ukraine UNHCR United Nations High Commissioner for Refugees USSR Union of Soviet Socialist Republics / Soviet Union