Title
Aldaba vs. Commission on Elections
Case
G.R. No. 188078
Decision Date
Mar 15, 2010
COMELEC sought reconsideration of SC's ruling on RA 9591, which created Malolos City's legislative district. SC upheld its decision, declaring the law unconstitutional due to unreliable population data and geographic isolation of Bulacan municipality.

Case Summary (G.R. No. 188078)

Applicable Law and Jurisdiction

The decision is governed by the 1987 Constitution, specifically Section 5(3) Article VI, which stipulates that cities must have a population of at least 250,000 to be entitled to representation in Congress. The act of creating legislative districts falls under the jurisdiction of the judiciary, which has the authority to review laws for their constitutionality and adherence to constitutional mandates.

Judicial Review and Justiciability

The COMELEC contended that the population indicators used by Congress to enact RA 9591 were non-justiciable, a claim that the Court rejected. The Court emphasized its judicial review power extends to questions on apportionment laws, asserting that it must examine the validity of the population data that Congress relied upon. Without such oversight, the constitutional limitations on legislative representation risk becoming ineffectual.

Reliability of Population Indicators

The Court found the population indicators that Congress utilized were neither reliable nor authoritative according to Executive Order No. 135 (EO 135). Various certifications presented, including those from the National Statistics Office (NSO) and local entities, failed to meet the official requirements mandated by EO 135, which demands that population estimates must be conducted by authorized bodies with scientific rigor.

Demographic Projections

The specific population projection cited by the NSO Director fell short of the constitutional threshold of 250,000 constituents. The Court invalidated the figures provided, noting that projections should be based on demographic estimates certified by the NSCB and conducted at specified times, further underscoring the pitfalls of using non-authoritative sources.

Legislative District Compliance

The Court determined that not only did Malolos City fail to meet the population requirement, but the creation of its legislative district under RA 9591 also isolated the municipality of Bulacan from contiguous representation. This fragmentation both violates and undermines the constitutional demand for legislative districts to be contiguous and compact.

Conclusion on Representation

Ultimately, the Court ruled that Malolos City is entitled to representation in Congress only if it surp

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