(1) "Public-service businesses" in this Act means businesses falling under any of the following subparagraphs, all of which are closely related to daily life of the public at large or have enormous effect on the economy of a nation: <Amended on Dec. 30, 2006>
1. Passenger transport business and airline business for regular routes;
2. Tap-water business, electricity business, gas business, petroleum refinery business and petroleum supply business;
3. Public sanitation business, medical service business and blood supply business;
4. Banking and mint business;
5. Broadcasting and telecommunications businesses.
(2) "Essential public-service businesses" in this Act means the following public-service businesses, which are referred to in paragraph (1) whose interruption or discontinuation shall cause conspicuous threats to daily life of the public at large or the national economy, and whose replacement is not easy: <Amended on Dec. 30, 2006>
1. Railway business, urban subway business and air transport business;
2. Tap-water business, electricity business, gas business, petroleum refinery business and petroleum supply business;
3. Hospital business and blood supply business;
4. Bank of Korea business;
5. Telecommunications businesses.