2023Toggle accordion Title of Circular Circular No. Date of Issuance Status Updated Guidance on PPE for Airport Workers (pdf, 49KB) 06/2023 18 Apr 2023 Active Updates on COVID-19 Vaccination and Booster (pdf, 64KB) 05/2023 1 Mar 2023 Active Revocation of COVID-19 Directive and Circulars (pdf, 84KB) 04/2023 28 Feb 2023 Active Advisory on PPE For Airport Workers (pdf, 34KB) 03/2023 13 Feb 2023 Active COVID-19 Pre-flight measures and requirements for passengers on flights to Singapore (pdf, 150KB) 02/2023 9 Feb 2023 Active Circular 01/2023 is inactive 2022Toggle accordion Title of Circular Circular No. Date of Issuance Status Circulars 14/2022 to 25/2022 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 2021/01 to 2021/86 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of COVID-19 into Singapore (pdf, 673 KB) 2020/23 23 Mar 20 Active Note: Paragraph 5 of Circular 2020/23 has been superseded by Paragraph 4 of Directive No. 8/2020.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