- Memo Circular No. 171 S. of 2023 2023-12-13 Adoption of Guidelines in the Preparation of Standard Parcellary Survey maps of Right-of-Way (ROW) for Government Infrastructure Projects for Submission andApproval in the DENR National Irrigation Administration · ONAR 23-1206
- Memo Circular No. 157 S. of 2023 2023-11-15 Guidelines for the Calibration and Registration of Engineering Survey Equipment of the National Irrigation Administration ImplementingOffices National Irrigation Administration · ONAR 23-1143
- Memo Circular No. 152 S. of 2023 2023-11-13 Records Management Policy (RMP) for the Safekeeping and Preservation of NIA Land Titles andall other Related Documents National Irrigation Administration · ONAR 23-1143
- Memo Circular No. 143 S. of 2023 2023-10-17 Official Monitoring and Tracking Sheet for Right-Of-Way Acquisition and Real Property TitlingAccomplishment National Irrigation Administration · ONAR 23-1143
- Memo Circular No. 141 S. of 2023 2023-10-17 To Ensure the Maximum Utilization of NIA-Owned, Administered or Occupied Lands National Irrigation Administration · ONAR 23-1143
- Memo Circular No. 114 S. of 2023 2023-09-18 Composition of Regional Asset Recovery and Management Team National Irrigation Administration · ONAR 23-1143
- Memo Circular No. 113 S. of 2023 2023-09-18 Expeditious Titling of NIA Real Properties Through Issuance of Special Patent National Irrigation Administration · ONAR 23-1143
- Memo Circular No. 101 S. of 2023 2023-08-07 Creation of AD Interim Asset Recovery Management Office (ARMO) National Irrigation Administration · ONAR 23-1143
- Office Memo No. 183 2023-08-07 Composition of AD Interim Asset Recovery and Management Office Under the Office of the SeniorDeputy Administrator National Irrigation Administration · ONAR 23-1143
- Amended Aquaculture Farm Agreements' Terms of Reference The Amended Aquaculture Farm Agreements' Terms of Reference (TOR) National Irrigation Administration · ONAR 23-0672
