Except during the Second World War, the chartered city of Davao also formed part of the province's representation.
[1] The non-Christian areas were to be collectively represented in the upper house's 12th senatorial district by two senators, both appointed by the Governor-General.
[1] Five assembly members, also appointed by the Governor-General, were to represent the seven component provinces of Department of Mindanao and Sulu — Agusan, Bukidnon, Cotabato, Davao, Lanao, Sulu and Zamboanga — in the lower house as a single at-large district.
The voters of Davao Province were finally given the right to elect their own representative through popular vote beginning in 1935 by virtue of Article VI, Section 1 of the 1935 Constitution.
[2] During the Second World War, the Province of Davao sent two delegates to the National Assembly of the Japanese-sponsored Second Philippine Republic: one was the provincial governor (an ex officio member), while the other was elected through a provincial assembly of KALIBAPI members during the Japanese occupation of the Philippines.