Administrative Order on COVID-19 Test
According to the Infectious Disease Control and Prevention Act in Article 46 (Measures for Medical Examination and Vaccination, etc.) to prevent the spread of COVID-19, the Busan Metropolitan City has issued an administrative order requiring people who have been informed to get tested for COVID-19 at medical centers or pharmacies to get the COVID-19 test within 48 hours.
For more details, see https://www.busan.go.kr/nhot/1485298 (Korean)