In a staggered election, the seats of the senators who were first disputed in 1922 were up for election. The Philippines is divided into 12 senatorial districts, of which all districts save for the 12th district, has one of its seats up.
In a staggered election, the seats of senators that were initially disputed in 1922 were up for consideration. The Philippines comprises 12 senatorial districts; all but the 12th have one seat available for election.