• MC 27-2021 Amendments to the Philippine Civil Aviation Regulations (PCAR) Annex 6, Part I Amendment 40-C
• MC 26-2021 Addendum to Memorandum Circular No. 22-2021 Dated 21 June 2021 RE: Transportation of Blood and Blood Products by Air
• MC 25-2021 Incorporation of ICAO Annex 6 Part II, Amendment 34-C to Philippine Civil Aviation Regulations and Amendments to PCAR Part 8
• MC 24-2021 Air Operators’ Compliance with the Latest ICAO Safety Issuances
• MC 23-2021 Amendment to the Philippine Manual of Standards for Aerodromes (MOS-Aerodromes) Incorporating Amendment 16 to ICAO Annex 14 Vol. I
• MC 22-2021 Transportation of Blood and Blood Products by Air
• MC 21-2021 Amendment to Memorandum Circular No. 07-2021 Dated 22 March 2021 RE: Validity of the Extended CAAP Issued Aircraft Certificate of Registration, Certificate of Airworthiness, Aircraft Material Distributor and Approved Maintenance Organization Certificates
• MC 20-2021 Resumption of Full Operations of Aeromedical Section, Office of the Flight Surgeon and Aviation Medicine
• MC 19-2021 Guidelines on the Pre-Deployment Process of Security Agency Under the New Security Service Contract
• MC 18-2021 Amendment to Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 3 Incorporating Amendment 80 to ICAO Annex 3
• MC 17-2021 Amendment 1 to Philippine Civil Aviation Regulations – Air Navigation Services Part 12, Issue 2
• MC 16-2021 Amendment to the Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 15 Incorporating Amendment 42 to ICAO Annex 15
• MC 15-2021 Amendments to the Philippine Civil Aviation Regulations (PCAR) Annex 6 Parts 1 and 2 Amendment 38 and 45
• MC 14-2021 Validity of Extended Training Alleviations
• MC 13-2021 Policy on Transfer and Acceptance of Assets/Properties to CAAP
• MC 12-2021 Policy on Management of Real Property Documents
• MC 11-2021 Guidelines on Progress Payments for Work Accomplished on Infrastructure Projects
• MC 10-2021 Guidelines on the Assignment, Duties and Responsibilities of ADMS Project Engineers, Resident Engineers and Project Inspectors
• MC 09-2021 Validity of the Extended CAAP Issued Air Operator Certificate, Validation of Foreign Air Operator Certificate, Dangerous Goods Certificate, RPAS Operator Certificate, Agricultural Aircraft Operator Certificate, Certificate of Authorization, Simulator Accreditation Certificate, Simulator Qualification Certificate and Cabin Crew Competency Certification
• MC 08-2021 Validity of the Extended CAAP Issued Airmen Licenses
• MC 07-2021 Validity of the Extended CAAP Issued Aircraft, Aircraft Material Distributor and Approved Maintenance Organization Certificates
• MC 06-2021 Amendment to the Philippine Manual of Standards for Aerodromes (MOS-Aerodromes) Incorporating Amendment 15 to ICAO Annex 14 Vol. I
• MC 05-2021 Guidelines for Carriage of Covid 19 Vaccines packed in Dry Ice by Air
• MC 04-2021 Adoption of ICAO Annex 10 Volume 1 Amendment 92 to Civil Aviation Regulations – Air Navigation Services Part 6 – Aeronautical Telecommunications Governing Radio Navigation Aids
• MC 03-2021 CAAP Implementing Guidelines on the Joint Memorandum Circular No. 2021-01
• MC 002-2021 Amendment to Philippine Civil Aviation Regulations – Air Navigation Seevices (CAR-ANS) Part 3 Incorporating Amendment 79 to ICAO Annex 3 and other Supplementary Amendments
• MC 001-2021 Amendment to the Philippine Manual of Standards for Aerodromes (MOS-Aerodromes) Incorporating Amendment 9 to ICAO Annex 14 VOL. II and other Supplementary Amendments
• Joint Memorandum Circular No. 2021-01 Violation of COVID-19-Related Directives