The issue of having the executive appointments reviewed and confirmed by another body had been the subject of debates and discussion by the 1934 Constitutional Convention.
Eventually, the idea of having a permanent commission that could review and approve executive appointments and free the President from the time consuming, humiliating, and impossible task of negotiating with every member of the Assembly for the approval of each appointment, paved the way for the creation of the Commission on Appointments (CA).
Under the 1935 Constitution, the CA was a 21-member Commission. A structural change in the legislature was made when the 1935 Constitution was amended in 1940. The amendment abolished the unicameral legislature and, in its place, a bicameral legislative body was created composed of the Senate and the House of Representatives.
Consequently, a structural change was also introduced to the composition of the CA - from a 21-Member body to a 25-Member body composed of the Senate President, as ex officio Chairman, 12 Senators and 12 Members of the House of Representatives.
The CA, however, was abolished with the adoption of the 1973 Constitution. The President had the sole appointing power without any check from a co-equal body.
Learning from the experience in which the power to appoint was exercised by the former President under the 1973 Constitution, provisions on the CA were again introduced in the 1987 Constitution. The provision on the composition of the CA under the 1935 Constitution, as amended, was adopted and, thus, reversion to the 25-Member CA.