2023Toggle accordion Title of Circular Circular No. Date of Issuance Status Keeping COVID-19 Vaccination Up-to-date (pdf, 119KB) 01/2023 5 Jan 2023 Active 2022Toggle accordion Title of Circular Circular No. Date of Issuance Status Circulars 23/2022 to 25/2022 are inactive COVID-19 Pre-flight measures and requirements for passengers on flights to Singapore (pdf, 515 KB) 22/2022 26 Aug 2022 Active Circulars 19/2022 to 21/2022 are inactive COVID-19 Measures for crew of foreign air operators (pdf, 152 KB) 18/2022 R4 10 May 2022 Active Circulars 14/2022 to 17/2022 are inactive Specification of Country or Region by the Director-General of Civil Aviation (pdf, 105KB) 13/2022 24 Feb 2022 Active Circulars 01/2022 to 12/2022 are inactive 2021Toggle accordion Title of Circular Circular No. Date of Issuance Status Circulars 2021/72 to 2021/86 are inactive Guidance on crew deployment in relation to MOH Health Protocols (pdf, 91KB) 2021/71 8 Nov 2021 Active Circulars 2021/01 to 2021/70 are inactive 2020Toggle accordion Title of Circular Circular No. Date of Issuance Status Circulars 2020/24 to 2020/51 are inactive Additional Precautionary Measure to Mitigate Risk of Importation of COVID-19 into Singapore (pdf, 673 KB) 2020/23 23 Mar 20 Active Note: Paragraph 5 of Circular 2020/23 has been superseded by Paragraph 4 of Directive No. 8/2020. Circulars 2020/01 to 2020/22 are inactive