Why this matters

A vacancy in the Sangguniang Bayan (SB)—the municipal legislative body—can shift voting dynamics, affect quorum, delay ordinances, and disrupt representation. Philippine law answers two big questions:

Is it really a “vacancy” that needs filling (and by whom)?
If it is, is it filled by succession, appointment, or the next person legally entitled to the seat?

The controlling framework is primarily the Local Government Code of 1991 (Republic Act No. 7160), especially on permanent vacancies and succession, plus election-law principles for situations where the “vacancy” is only apparent.

Start with the seat type: not all “SB seats” are filled the same way

A. Regular elective SB members

These are the councilors elected at large, or by district if applicable, for the municipality.

General rule for a true permanent vacancy after assumption: filled by appointment, not by special election.

B. The Presiding Officer: the Vice-Mayor

The Vice-Mayor is the presiding officer of the SB and is separately elected.

General rule: vacancy is filled by succession by the highest-ranking SB member, and then that succession creates a separate councilor vacancy that is filled by appointment.

C. Ex officio SB members

Common ex officio members include:

Liga ng mga Barangay (LNB) Municipal Federation President
SK / Pederasyon ng Sangguniang Kabataan Municipal Federation President

General rule: their SB seat is filled by whoever becomes the federation president under the organization’s rules/election—not by the Mayor or Governor as a regular SB vacancy appointment. RA 7160 Section 45(d) provides that vacancies in youth and barangay representation in the sanggunian are filled automatically by the official next in rank of the organization concerned. (Supreme Court E-Library)

D. Other special/mandatory representations, where applicable

Some LGUs have additional representation created by special laws and implementing rules, for example, Indigenous Peoples Mandatory Representative (IPMR) where applicable. Vacancies there are typically filled under the rules of the applicable special law, agency, or guidelines, not through the standard regular SB vacancy appointment process.

What counts as a “vacancy” that can be filled?

Under the Local Government Code concept of permanent vacancy, an elective official’s office becomes vacant when the official finally leaves office due to causes such as:

death
voluntary resignation
removal from office
permanent incapacity
refusal to assume office
failure to qualify
filling a higher vacant office
other causes that permanently sever the official’s title to office

This matters because not every “missing councilor” situation is a fillable vacancy. Section 44 of RA 7160 defines permanent vacancy for succession purposes to include when an elective local official fills a higher vacant office, refuses to assume office, fails to qualify, dies, is removed from office, voluntarily resigns, or is otherwise permanently incapacitated. (ChanRobles Law Firm)

Situations that look like vacancies but may not be appointable vacancies

Election-entitlement issues
- If a “winner” is later found not legally entitled to the seat, the question may be who was legally entitled to the seat in the first place, rather than who should be appointed to a vacancy.
Temporary absence, leave, or temporary incapacity
- A councilor on leave is generally still the councilor; the seat is not permanently vacant.
Preventive suspension
- Suspension typically does not erase title to the office; it restricts exercise of functions for a time.

Practical takeaway: Before anyone “fills” anything, the municipality should confirm whether the situation is an election-entitlement issue or a true post-assumption permanent vacancy.

The core question: Who has authority to fill a permanent vacancy in a regular SB seat?

The appointing authority is the Provincial Governor

For a permanent vacancy in a regular elective SB member’s seat, where automatic succession does not apply, the Local Government Code places the appointment power in the Governor, in the case of the Sangguniang Bayan. Section 45(a)(2) of RA 7160 states that permanent vacancies in the sanggunian shall be filled by appointment by “the governor, in the case of the sangguniang panlungsod of component cities and the sangguniang bayan.” (Supreme Court E-Library)

So, as a rule:

Permanent vacancy in a regular SB councilor seat → filled by appointment by the Provincial Governor.

The Municipal Mayor is the appointing authority for vacancies in the Sangguniang Barangay, upon recommendation of the Sangguniang Barangay concerned. (Supreme Court E-Library)

The political party rule

If the vacating member belonged to a political party

The replacement must come from the same political party as the member who caused the vacancy, and the appointment is made in the manner provided by RA 7160 Section 45. The appointee must be the party’s nominee, and the required nomination and certificate of membership from the highest official of the political party concerned are conditions sine qua non; without them, the appointment is void. (Supreme Court E-Library)

What this means in real terms

The Governor is the appointing authority, but the Governor’s choice is constrained by the statutory requirement that the replacement be:
1. from the same political party, and
2. properly nominated and certified by that party.

Many LGUs operationalize this by requiring the party to submit nomination/endorsement documents through the party’s proper officers. Disputes often arise over who in the party is authorized to nominate and whether the nomination is valid.

If the vacating member was an independent

If the outgoing councilor had no political party, the appointment is still made by the Governor, but upon recommendation of the Sangguniang Bayan concerned.

The Supreme Court in Fariñas v. Barba construed RA 7160 Section 45 to mean that, where the vacancy in the Sangguniang Bayan is caused by a member who does not belong to any political party, the Governor appoints upon recommendation of the Sangguniang Bayan. The Court specifically rejected both a mayoral appointment and a gubernatorial appointment made without the proper SB recommendation. (Supreme Court E-Library)

Vice-Mayor vacancy: who fills it, and who fills the vacancy that follows?

Step 1: The Vice-Mayor vacancy is filled by succession

If the Vice-Mayor position becomes permanently vacant, the successor is the highest-ranking SB member.

“Highest-ranking” is determined under RA 7160 by the proportion of votes obtained by each winning candidate to the total number of registered voters in each district in the immediately preceding local election. A tie between or among the highest-ranking sanggunian members is resolved by drawing of lots. (ChanRobles Law Firm)

Step 2: Succession creates a new vacancy in the SB

Once the highest-ranking SB member becomes Vice-Mayor, the SB now has a vacant regular councilor seat.

Step 3: That councilor vacancy is filled by Governor’s appointment

The Provincial Governor then fills that resulting SB vacancy by appointment, following the same party/independent rules described above.

Ex officio SB vacancies: who fills them?

Liga ng mga Barangay (LNB) ex officio seat

The SB seat belongs to whoever is the LNB Municipal Federation President. If that person leaves, the vacancy is filled under the organization’s rules, generally by the official next in rank of the organization concerned.

SK/Pederasyon ng Sangguniang Kabataan ex officio seat

Similarly, the SB seat attaches to whoever is the SK Municipal Federation President. The duly elected president of the Pederasyon ng Sangguniang Kabataan serves as ex officio member of the Sangguniang Bayan, Sangguniang Panlungsod, or Sangguniang Panlalawigan, as applicable. (Supreme Court E-Library)

Key point: The Mayor or Governor generally does not appoint ex officio representatives into the SB through the regular SB vacancy process, because the SB seat is derivative of leadership in the relevant organization.

Qualifications and disqualifications still apply to appointees

An appointee to a regular SB seat must meet the qualifications for elective local officials and must not fall under statutory disqualifications.

Common baseline requirements include:

Philippine citizenship
registered voter in the municipality or district concerned, as applicable
residency for the period required by law
ability to read and write Filipino or a local language/dialect
minimum age requirement for the position

Section 39 of RA 7160 provides the general qualifications for elective local officials, including citizenship, voter registration, residency, literacy, and age requirements. (Commission on Elections)

A practical decision guide: authority to fill

1) Is the situation a true “permanent vacancy” after assumption?

Yes → proceed to Step 2
No / it’s an election-entitlement dispute → do not automatically treat it as an appointable vacancy

2) What seat is vacant?

Regular SB councilor seat → Provincial Governor appoints
- If party member → from the same party, with the required party nomination and certification
- If independent → Governor appoints a qualified person upon recommendation of the Sangguniang Bayan concerned
Vice-Mayor seat → Highest-ranking SB member succeeds
- Then the Governor appoints to fill the resulting SB vacancy
Ex officio seat, such as Liga/SK → filled by the organization’s succession/election rules, generally by the official next in rank of the organization concerned
Sangguniang Barangay vacancy → City or Municipal Mayor appoints, upon recommendation of the Sangguniang Barangay concerned

Common pitfalls and how to avoid them

Treating an election dispute as an appointable vacancy
- If someone was never lawfully entitled to the seat, appointment can be challenged.
Naming the wrong appointing authority
- For a regular Sangguniang Bayan vacancy, the appointing authority is the Provincial Governor, not the Municipal Mayor.
- The Municipal Mayor appoints in the case of Sangguniang Barangay vacancies, upon recommendation of the Sangguniang Barangay concerned. (Supreme Court E-Library)
Ignoring the party nomination/certification requirement
- Filling a party-linked vacancy without the required nomination and certification can make the appointment void.
Ignoring the SB recommendation requirement for independents
- If the vacating SB member was independent, the Governor’s appointment must be upon recommendation of the Sangguniang Bayan concerned.
Confusing temporary absence with vacancy
- Absence, leave, or suspension usually does not extinguish title; it often does not authorize a replacement appointment.

Bottom line

In the Philippine municipal context, the Provincial Governor is the appointing authority to fill a permanent vacancy in a regular Sangguniang Bayan councilor seat, subject to the applicable political party nomination/certification rule if the vacating member belonged to a political party, or the Sangguniang Bayan recommendation rule if the vacating member was independent. A Vice-Mayor vacancy is filled first by succession by the highest-ranking SB member, and the resulting SB vacancy is then filled by Governor’s appointment. Ex officio seats are filled through the relevant organization’s internal succession or election rules—not through the regular SB vacancy appointment process.