Every local government unit, be it a
province,
city,
municipality or a
barangay elects a chief executive (a governor, city mayor, municipal mayor and barangay chairman, respectively), and a local legislature (the
Sangguniang Panlalawigan,
Sangguniang Panlungsod,
Sangguniang Bayan and
Sangguniang Barangay, respectively), president upon by the chief executive's deputy (vice-governor, city vice-mayor, municipal vice-mayor, respectively; no equivalent for the barangay). In addition, the
Autonomous Region in Muslim Mindanao (ARMM) elects a governor, vice-governor and members of the
ARMM Regional Legislative Assembly. Elections where one seat is being disputed, such as the regional governor and vice governor in the
Autonomous Region in Muslim Mindanao, provincial governors and vice governors in each of the 81
provinces, and mayors and vice mayors in each of the 145
cities and 1,489
municipalities are elected via the
plurality system. Elections where more than one seat is disputed, such as for the membership in local legislatures, are done via
plurality-at-large voting. For
Sangguniang Panlalawigan seats, the
Commission on Elections divides all provinces into at least 2 districts, while for
Sangguniang Panlalawigan seats, the appropriation depends on the city charter (some are divided into districts, while others elect all councilors
at-large), and for
Sangguniang Bayan seats, all municipalities have eight councilors elected
at-large, except for
Pateros, which elects twelve, six in each district. ==Participating parties==