Essential services may refer to a class of occupations that have been legislated by a government to have special restrictions in regard to labour actions, such as not being allowed to legally strike.
The International Labour Office, a United Nations agency, makes distinctions between an essential service and a minimum service.
While maintaining a right to strike, the ILO recognizes situations and conditions under which a minimum operational service could be required.
Examples where the ILO considered conditions met for a minimum operational service include a ferry service, ports, underground railway, transportation of passengers and commercial goods, postal services, refuse collection service, the mint, banking services, petroleum sector services, education services, and animal health services.