"Authorities are government agencies, regulatory bodies, institutions, or organisations recognised as a legal authority, such as setting standards or enforcing rules in a specific area or domain. Examples include major organisations such as the World Heath Organisation, or the US Food & Drug Administration, to much smaller entities covering much more limited areas. All authorities need premises, staff, communications and, depending on their role, may have more critical or lighter security concerns. Housing authorities, school boards, museums, libraries and historical sites all apply video surveillance to secure and monitor their properties and the people who use them. Authorities who have lone workers (such as inspectors or social workers) who may be subject to abuse, often use body-worn cameras to deter such behaviour, coupled with personal alarm buttons. Some systems are monitored centrally, with emergency responses to alarms and live video verification as 5G becomes more widely available."