- Republic Act No. 2651, An Act Providing for the Construction of the Jalaur Multi-Purpose Project in the Province of Iloilo and Governing its Operation After its Completion, 18 June 1960
- Republic Act 3601, An Act Creating the National Irrigation Administration, 22 June 1963
- Presidential Decree 552, Amending Certain Sections of Republic Act Numbered Thirty Six Hundred and One, Entitled, "Act Creating the National Irrigation Administration", 11 September 1974
- Presidential Decree 1702, Amending Section 3 of Republic Act No. 3601 as Amended by Presidential Decree No. 552, 18 July 1980
- Memorandum Order No. 38, Further Amending Certain Sections of Republic Act Numbered Thirty Six Hundred and One, Entitled, "An Act Creating the National Irrigation Administration", 15 September 1986
- Executive Order No. 165, Transferring the National Food Authority, National Irrigation Administration, Philippine Coconut Authority, and Fertilizer and Pesticide Authority to the Office of the President, 5 May 2014
- Memorandum Order No. 70, Providing for the functions of the Presidential Assistant for Food Security and Agricultural Modernization, 5 May 2014



