Source: Nohlen, Grotz and Hartmann[3] and Teehankee[4]
Local plebiscites
Aside from the general election, local plebiscites were also held on this day. One was for the division of the province of Samar into three provinces, namely Eastern Samar, Northern Samar and Western Samar (renamed in 1969 as "Samar"). Six were for conversion of municipalities into cities, with two being renamed as well. All were carried, except for the cityhood of Batangas and renaming it to "Laurel City".
In Leyva vs. COMELEC, the Supreme Court reversed COMELEC's proclamation of the cityhood of Rajah Buayan being approved, as it ruled that its implementing law decreed that the majority of the votes must be taken into account all of the registered voters, and not just those who voted. As the votes for cityhood were less than the majority of all voters, the Rajah Buayan's cityhood was nullified, and it reverted back as the municipality of General Santos.
^Dieter Nohlen; Florian Grotz; Christof Hartmann; Graham Hassall; Soliman M. Santos. Elections in Asia and the Pacific: A Data Handbook: Volume II: South East Asia, East Asia, and the South Pacific.
^Dieter Nohlen; Florian Grotz; Christof Hartmann; Graham Hassall; Soliman M. Santos. Elections in Asia and the Pacific: A Data Handbook: Volume II: South East Asia, East Asia, and the South Pacific.
^Nohlen, Dieter; Grotz, Florian; Hartmann, Christof (eds.). Elections in Asia and the Pacific: A Data Handbook. Vol. 2: South East Asia, East Asia, and the South Pacific. Oxford: Oxford University Press..
^Teehankee, Julio (2002). "Electoral Politics in the Philippines" (PDF). In Croissant, Aurel (ed.). Electoral Politics in Southeast and East Asia. Singapore: Fiedrich-Ebert-Siftung. pp. 149–202 – via quezon.ph.