The Republic Act 9591, entitled "An Act Amending Section 57 of Republic Act No. 8754, otherwise known as the Charter of the City of Malolos" was passed by the House of Representatives and the Senate on April 29, 2008 and February 16, 2009 respectively. It was transmitted to the Office of the President on March 31, 2009. The Act lapsed into law on May 1, 2009 without the signature of the President, in accordance with Article VI, Section 27 (1) of the Constitution.