After Aquino assumed the presidency in 1986, Muñoz-Palma called in vain for the retention of the unicameral Batasang Pambansa as the country's legislative body but such plea was not heeded by the new President. Instead, the President dissolved it by means of a proclamation, which formed a provisional constitution that declares her government to be revolutionary and assumed legislative powers the now former Batasan held. When Aquino created the 1986 Constitutional Commission to draft the new Constitution, she appointed Muñoz-Palma as one of its members. The Commission would later elect her as its Chairwoman.