Tobias vs. Abalos

The creation of a separate legislative district for a newly converted highly urbanized city is a necessary consequence of its conversion and does not constitute a separate subject in violation of the one title-one subject rule. The constitutional provision setting a 250-member limit on the House of Representatives is not absolute and may be changed by law. A plebiscite on a city's conversion need not include voters from the affected adjacent municipality whose legislative district is incidentally altered.

Prior to the enactment of Republic Act No. 7675, the municipalities of Mandaluyong and San Juan formed a single legislative district represented by Congressman Ronaldo Zamora. Congressman Zamora sponsored the bill that became R.A. No. 7675, which was signed into law by President Fidel V. Ramos on February 9, 1994. The law provided for a plebiscite to ratify the conversion, which was held on April 10, 1994, exclusively for the voters of Mandaluyong. The plebiscite passed, and the law took effect.

• Nature of the Action: Petitioners, as taxpayers and residents of Mandaluyong, filed a petition for certiorari and prohibition assailing the constitutionality of R.A. No. 7675.
• The Assailed Legislation: R.A. No. 7675, titled "An Act Converting the Municipality of Mandaluyong into a Highly Urbanized City to be known as the City of Mandaluyong," contained Article VIII, Section 49, which created a separate legislative district for Mandaluyong and defined the remainder as the new legislative district of San Juan.
• The Plebiscite: Pursuant to the Local Government Code, a plebiscite was held on April 10, 1994, exclusively for the voters of Mandaluyong. With a 14.41% turnout, 18,621 voted in favor and 7,911 voted against, ratifying the law.
• Petitioners' Core Challenge: Petitioners argued that Section 49 of R.A. No. 7675 was unconstitutional on three grounds: (1) it violated the "one subject-one bill" rule (Art. VI, Sec. 26(1)); (2) it increased the House membership beyond the constitutional 250-member limit without a census-based reapportionment (Art. VI, Sec. 5(1) & (4)); and (3) it preempted Congress's reapportionment power.
• Respondents' Defense: The Solicitor General defended the law's constitutionality, arguing the legislative district creation was a necessary consequence of cityhood, the 250-member limit is not absolute, and Congress cannot preempt itself.

• Violation of the One Subject-One Bill Rule: Petitioners argued that R.A. No. 7675 embraced two distinct subjects: (1) the conversion of Mandaluyong into a city, and (2) the division of the San Juan/Mandaluyong legislative district. The latter was not germane to the former as expressed in the law's title.
• Unconstitutional Increase in House Membership: Petitioners contended that creating a new district increased the House composition beyond 250 without a prior census showing both municipalities met the 250,000-population requirement, violating the reapportionment mandate of Article VI, Section 5(4).
• Preemption of Congressional Power: Petitioners asserted that Section 49 effectively preempted Congress's exclusive power to reapportion legislative districts.

• Consequence of Cityhood Conversion: Respondents countered that creating a separate legislative district for Mandaluyong was a "natural and logical consequence" of its conversion into a highly urbanized city, as mandated by Article VI, Section 5(3) of the Constitution ("each city with a population of at least two hundred fifty thousand... shall have at least one representative").
• Presumption of Constitutionality and Liberal Construction: Respondents argued that the law enjoys a presumption of validity, and the one title-one subject rule should be liberally construed. The title expressed the general subject, and the district creation was germane to it.
• Constitutional Flexibility on House Size: Respondents maintained that the 250-member limit in Article VI, Section 5(1) is qualified by the phrase "unless otherwise fixed by law," permitting Congress to alter it through legislation.
• No Preemption by Congress: Respondents argued that Congress cannot preempt itself, as it was Congress that enacted the law, including the reapportionment provision.

• One Subject-One Bill Rule: Whether Article VIII, Section 49 of R.A. No. 7675, creating a separate legislative district for Mandaluyong, violates the constitutional requirement that every bill shall embrace only one subject expressed in its title (Art. VI, Sec. 26(1)).
• House Membership and Reapportionment: Whether the creation of a new legislative district unconstitutionally increases the House membership beyond 250 and effects a reapportionment without compliance with the census-based standard (Art. VI, Sec. 5(1) & (4)).
• Plebiscite Requirement: Whether the inhabitants of San Juan should have been allowed to participate in the plebiscite, given the law's effect on their legislative district.

• One Subject-One Bill Rule: The creation of a separate legislative district for Mandaluyong did not violate the one subject-one bill rule. The provision was a natural and logical consequence of converting Mandaluyong into a highly urbanized city with a population of at least 250,000, as constitutionally required. The title "An Act Converting the Municipality of Mandaluyong Into a Highly Urbanized City" necessarily contemplated the incidental creation of a separate district. The rule is to be given a liberal, practical construction to avoid impeding legislation.
• House Membership and Reapportionment: The increase in congressional districts did not render the law unconstitutional. The 250-member limit in Article VI, Section 5(1) is explicitly subject to change "unless otherwise fixed by law." Congress, through R.A. No. 7675, provided for such a change. The law enjoys the presumption that Congress duly considered population requirements, and it is not required to recite all supporting data within the statute itself. The argument that the law preempts Congress's reapportionment power is unavailing, as Congress cannot preempt itself.
• Plebiscite Requirement: The plebiscite was properly confined to the voters of Mandaluyong. The principal subject was the conversion of Mandaluyong's status. The alteration of San Juan's legislative district was merely an ancillary consequence, and the people of San Juan had no direct say in the change of status of a neighboring municipality.

• One Title-One Subject Rule (Liberal Construction) — The constitutional requirement that a bill embrace only one subject expressed in its title is to be given a practical, not technical, construction. It is sufficient if the title expresses the general subject and all provisions are germane to that general subject. The rule does not require the title to catalog every detail of the law.
• Presumption of Constitutionality of Statutes — Every statute carries a strong presumption of constitutionality. All doubts are resolved in favor of validity, and the burden rests on the challenger to demonstrate a clear and unequivocal breach of the Constitution.
• Constitutional Mandate for City Representation — The Constitution (Art. VI, Sec. 5(3)) provides that each city with a population of at least 250,000 shall have at least one representative. The conversion of a municipality into a highly urbanized city meeting this population threshold thus constitutionally necessitates the creation of a separate legislative district.

• "The creation of a separate congressional district for Mandaluyong is not a subject separate and distinct from the subject of its conversion into a highly urbanized city but is a natural and logical consequence of its conversion into a highly urbanized city." — This articulates the core reasoning for upholding the law against the one subject-one bill challenge.
• "The Constitution clearly provides that the House of Representatives shall be composed of not more than 250 members, 'unless otherwise provided by law.' The inescapable import of the latter clause is that the present composition of Congress may be increased, if Congress itself so mandates through a legislative enactment." — This clarifies the non-absolute nature of the House membership cap.
• "Congress cannot possibly preempt itself on a right which pertains to itself." — This succinctly dismisses the argument that R.A. No. 7675 usurped Congress's reapportionment power.

• Sumulong v. Comelec, 73 Phil. 288 (1941) — Cited for the principle that the one subject-one bill rule should be given a practical rather than a technical construction.
• Lidasan v. Comelec, 21 SCRA 496 (1967) — Cited to elucidate that the title of a law need not catalog every detail; it is sufficient if it informs legislators and the public of the nature, scope, and consequences of the proposed law.

• Article VI, Section 26(1), 1987 Constitution — The "one subject-one bill" rule. The Court held that the creation of a legislative district was germane to the subject of city conversion expressed in the title of R.A. No. 7675.
• Article VI, Section 5(1), 1987 Constitution — Provides for the composition of the House of Representatives, including the 250-member limit "unless otherwise fixed by law." The Court ruled this clause authorized Congress to increase the number of districts via R.A. No. 7675.
• Article VI, Section 5(3), 1987 Constitution — Mandates that each city with a population of at least 250,000 shall have at least one representative. The Court found this provision made the creation of a district for Mandaluyong a necessary consequence of its cityhood.
• Article VI, Section 5(4), 1987 Constitution — Requires reapportionment within three years after every census. The Court found no violation, as the law itself constituted a valid reapportionment by Congress.

Chief Justice Andres R. Narvasa, Justices Florenz D. Regalado, Abdulwahid A. Bidin, Hilario G. Davide, Jr., Flerida Ruth P. Romero, Jose C. Vitug, Santiago M. Kapunan, Vicente V. Mendoza, Carolina C. Griño-Aquino, and Jose A.R. Melo.

N/A — The decision was unanimous. Justice Feliciano was on leave.