• MC 04-18 Amendment to Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 6 Incorporating Amendment 88B to ICAO Annex 10 Volume 1
• MC 05-18 Amendment to Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 6 Incorporating Amendment 89 to ICAO Annex 10 Volume 1
• MC 06-18 Amendment to Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 6 Incorporating Amendment 90 to ICAO Annex 10 Volume 1
• MC 07-18 ANF Certification Process
• MC 14-18 Revision to MC 003-17 dated March 7, 2017 re Clarification on the Procedures and Documentary Requirement in Proficiency Checks Conducted by Designated Check Airman (DCA)
• MC 15-18 Birdstrike Reporting Form
• MC 17-18 Amendment To Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 7 Incorporating Amendment 90 to ICAO Annex 10 Volome III Part I
• MC 18-18 Amendment To Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 8 Incorporating Amendment 90 to ICAO Annex 10 Volome III Part II
• MC 23-18 Registration of ELT
• MC 24-18 Development and Implementation of Programs Focusing on Adverse Weather Condition
• MC 25-18 Addendum to Memorandum Circular No. 005-17 for the Adoption of Corrigendum No. 1 to Annex 3 Amendment 77
• MC 28-18 General Operating Instructions for R-985 Engines, Visual Inspections and VFR Only Operations
• MC 29-18 Amendment to Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 4 Incorporating Amendment 60 to ICAO Annex 4 and Other Supplementary Amendments
• MC 32-18 Implementation of ICAO SARPS, Annex 16, Volume 4 on Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA)
• MC 33-18 Amendment to Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 3 Incorporating Amendment 78 to ICAO Annex 3 and Other Supplementary Amendments
• MC 34-18 Amendment to Philippine Civil Aviation Regulations – Air Navigation Services (CAR-ANS) Part 9 Incorporating Amendment 90 to ICAO Annex 10 Vol IV (Surveillance and Collision Avoidance Systems)