Redistricting
Congress is mandated to reapportion the legislative districts within three years following the return of every census. Since its restoration in 1987, no general apportionment law has been passed, despite the publication of four censuses in 1990, 1995, 2000 and 2007. The increase in the number of representative districts since 1987 were mostly due to the creation of new provinces, cities, and piecemeal redistricting of certain provinces and cities.
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