The Presidential Legislative Liaison Office (PLLO) was created by Memorandum Order No. 128 dated 11 November 1987, as amended by Memorandum Order No. 142 dated 17 December 1987 during the term of President Corazon C. Aquino.
Under the Administration of former President Fidel V. Ramos, several pronouncements were issued that further strengthened the existence of PLLO and compelled a departure from its traditional mould. In particular, during the first plenary conference of the President with the newly elected Senators and Congressmen held at Malacañang Manila on 22 July 1992, the President formally announced that the PLLO is the agency under the Office of the President that will liaise with Congress regarding all matters impinging on Executive Legislative relations.
The said meeting was also attended by Members of the Cabinet. Moreover, in the regular Cabinet Meeting on 28 July 1992, the President gave one of the most significant guiding statements when he announced that the PLLO is the agency under the Office of the President tasked to officially orchestrate the formulation and the shepherding..