Case Summary (G.R. No. 193301)
Procedural history in summary
Municipal Assessor of Norzagaray issued two notices of assessment to NPC: a Machineries Assessment for the period January 1, 1996–December 31, 2005 (tax due originally PHP 113,960,000.00) and a Land Assessment for January 1, 1997–December 31, 2006 (initially PHP 18,475,003.20). NPC appealed administratively to the Local Board of Assessment Appeals (LBAA). LBAA denied NPC’s protest and ordered payment. On appeal, the Central Board of Assessment Appeals (CBAA) affirmed. NPC then appealed to the Court of Tax Appeals (CTA) En Banc, which affirmed the CBAA and denied reconsideration. NPC filed a Petition for Review to the Supreme Court under Rule 45.
Notices of assessment — particulars and revisions
Machineries Assessment listed eleven facilities (e.g., main dam, spillway and taintor gates, diversion and tailrace tunnels, penstock, power intake structures, surge tunnel, draft tube gates/hoists) aggregated to the stated tax liability for the 1996–2005 period. For the Land Assessment the Municipal Assessor later acknowledged an initial error in assessment level and issued an amended statement of account (June 1, 2007) reducing the land tax to PHP 6,485,422.60 for the covered period; this amendment was confirmed in a subsequent letter dated July 12, 2007.
NPC’s claims and procedural defense
NPC advanced two principal contentions before the administrative boards and in judicial proceedings: (1) the machineries and equipment assessed are exempt from real property tax (RPT) under Section 234(c) of the LGC because they are actually, directly and exclusively used in the generation and transmission of electric power (and invoked machinery definitions in Section 199(o)); and (2) the land assessment was erroneous because the proper assessment level for GOCCs is 10% (Section 218(d)). NPC also argued that payment under protest was not required because it was challenging the assessor’s authority to tax exempt property — an argument invoking Ty v. Trampe and related authorities.
LBAA ruling — jurisdictional and factual conclusions
The LBAA held that payment under protest (Section 252) is a condition sine qua non to invoke the appellate remedy before the LBAA and rejected NPC’s reliance on Ty v. Trampe. The LBAA found NPC failed to prove the machineries were actually, directly, and exclusively used for power generation and therefore not exempt. The LBAA ordered NPC to pay the assessed taxes (land and machineries) for the applicable periods.
CBAA ruling — factual findings and conclusion
The CBAA affirmed the LBAA after conducting hearings and an ocular inspection. It concluded the dam and appurtenances are multi-purpose structures used for irrigation, flood control, domestic water supply, and other non-power functions in addition to power generation, thereby negating the exclusivity requirement for exemption. The CBAA deemed the land-assessment issue moot after the municipal assessor’s correction but upheld taxation of the eleven machineries/structures.
CTA En Banc decision and reasoning on procedural bar
The CTA En Banc denied NPC’s petition, holding NPC’s administrative protest was ineffective because it did not first pay the tax under protest as required by Section 252. The CTA treated NPC’s exemption claim as a question of the correctness or reasonableness of the assessment — a factual matter for administrative resolution — and therefore concluded administrative remedies were not exhausted, rendering NPC’s action premature and not ripe for judicial determination.
Issues before the Supreme Court
The Supreme Court identified and addressed three issues: (1) whether payment under protest (Section 252) is a condition precedent to question a local assessment before the LBAA; (2) whether the properties in the Machineries Assessment are exempt from RPT under Section 234(c); and (3) whether the properties in the Land Assessment are exempt from RPT.
Supreme Court’s analysis of the payment-under-protest rule and exhaustion doctrine
The Court reaffirmed the governing principle: where the dispute concerns the reasonableness or correctness of an assessment (questions of fact), the taxpayer must comply with the payment-under-protest requirement of Section 252 before appealing to the LBAA; the LBAA’s role is primarily fact-finding (Section 229). Conversely, when the taxpayer challenges the assessor’s authority or the legality of the assessment (a pure question of law), payment under protest is not required and judicial relief may be sought directly (e.g., injunction in the RTC). The Court reviewed and distinguished Ty v. Trampe and Olivarez v. Marquez, explaining those cases involved pure legal questions (assessor’s authority or validity of scheme) rather than factual disputes over exclusive use.
Application of the rule to NPC’s claims and the CTA’s handling
Applying that framework, the Court concluded NPC’s claim for tax exemption was principally a factual claim as to whether the listed properties were actually, directly and exclusively used for power generation — therefore ordinarily subject to Section 252’s payment-under-protest requirement. The Court noted past rulings (e.g., Napocor v. Province of Quezon; Camp John Hay) that treated exemption claims as factual and administrative in nature. Thus NPC should have paid the tax under protest before pursuing LBAA remedies; absence of payment ordinarily renders administrative appeals premature.
Exception to exhaustion and rationale for proceeding to the merits
Despite concluding NPC failed to observe the payment-under-protest prerequisite, the Supreme Court explained the exhaustion requirement is flexible and not strictly jurisdictional. Because the LBAA and CBAA had already entertained and adjudicated the factual merits (including hearings, ocular inspections, and evidence admission), remanding the case to the administrative boards for compliance would be futile and would frustrate practical administration: the boards had in effect decided the facts, a Warrant of Levy had been issued, a TRO had been previously issued by this Court, and the case had been pending for many years. Given these circumstances and the administrative bodies’ full exercise of fact-finding functions, the Court proceeded to decide the substantive exemptions issue on the merits rather than remanding.
Legal standard for exemption under Section 234(c) and definitions of “machinery”
The Court reiterated the statutory test for exemption under Section 234(c): the claimant must show (a) the machineries and equipment are actually, directly, and exclusively used by a local water district or GOCC, and (b) the claimant is engaged in supply/distribution of water or generation/transmission of electric power. The Court emphasized the LGC’s definition of “machinery” (Section 199(o)) and the implementing rule (Article 290(o)): items qualify as “machinery” for exemption purposes if they are actually, directly and exclusively used for the exempting purpose and are by their nature necessary or indispensable to that activity. The Court cautioned that “exclusive” use requires more than a dominant or principal use; it requires de facto exclusion of other non-exempt uses.
Factual findings on the machineries/structures and deference to administrative findings
The Supreme Court gave substantial deference to the LBAA and CBAA factual findings, finding no reversible error in their evaluation of evidence. The boards had determined that the main dam and the listed structures are multi-purpose: they store and regulate water for irrigation, domestic water supply (MWSS), flood control, and other public functions in quantities and uses exceeding or independent of their use for power generation. The boards found the truly exclusive machineries for power generation (turbines, generators, transformers, transmitters) were excluded from assessment. Because the eleven assessed facilities were not shown to be actually, directly and exclusively used for generation/transmission, they did not meet the statutory exemption test.
Treatment of pollution-control/environmental-protection exemption and NPC’s late invocation
The Court rejected NPC’s belated and undeveloped claim that the properties were exem
Case Syllabus (G.R. No. 193301)
Core Holding
- A claim for exemption from real property tax (RPT), whether full or partial, ordinarily challenges the correctness or reasonableness of an assessment and is therefore a question of fact to be resolved by administrative bodies; consequently, compliance with the "payment under protest" requirement in Section 252(a) of the Local Government Code (LGC) is generally mandatory before administrative appeal to the Local Board of Assessment Appeals (LBAA) may be invoked.
- Where the challenge, however, is to the very authority or power of the assessor/treasurer (a pure question of law with no factual issues), the payment-under-protest requirement does not apply and the appropriate remedy is a judicial action.
- Applying these principles, the Court denied National Power Corporation’s (NPC) Petition for Review, set aside the Court of Tax Appeals (CTA) En Banc decision and resolution, and held NPC liable for RPT: PHP 113,960,000.00 for the Machineries Assessment (Jan. 1, 1996–Dec. 31, 2005) and PHP 6,485,422.60 for the Land Assessment (Jan. 1, 1996–Dec. 31, 2006); the Temporary Restraining Order previously issued was lifted.
Antecedent Facts
- NPC is a government-owned and controlled corporation (GOCC) that owns and operates the Angat Hydro-Electric Power Plant located at Hilltop, San Lorenzo, Norzagaray, Bulacan.
- NPC received two notices of assessment from the Municipal Assessor of Norzagaray:
- Machineries Assessment (Notice dated December 12, 2006) covering January 1, 1996 to December 31, 2005: lists ARP Nos. 00180–00190 (main dam, spillway, diversion tunnels, tailrace tunnel, penstock, auxiliary draft tube gates, draft tube gates and hoists, power tunnel, power intake structure, surge tunnel, power intake service & bulkhead gates) with itemized Basic Tax and SEF Tax amounts and subtotaled sums.
- Land Assessment (Notice dated December 14, 2006) covering January 1, 1997 to December 31, 2006: lists ARP Nos. 00191–00193 (camp site, spillway, powerhouse) and total tax due PHP 82,845,188.60.
- The parties failed to settle amicably; NPC filed administrative appeals to the LBAA asserting two principal errors: (1) the machineries are exempt under Section 234(c) of the LGC as actually, directly and exclusively used in generating and transmitting electricity; and (2) the land was assigned an incorrect assessment level (40% instead of 10% for GOCCs under Section 218(d) of the LGC).
Specifics of the Notices and Amounts (as presented in source)
- Machineries Assessment (ARP Nos. and amounts as shown in source table):
- ARP 00180 Main Dam – Basic Tax 2,200,000.00; SEF Tax 2,200,000.00; Tax Due 4,400,000.00
- ARP 00181 Spillway with three Taintor Steel Gates – Basic 1,000,000.00; SEF 1,000,000.00; Tax Due 2,000,000.00
- ARP 00182 Two Units Diversion Tunnel – Basic 340,000.00; SEF 340,000.00; Tax Due 680,000.00
- ARP 00183 Tailrace Tunnel – Basic 700,000.00; SEF 700,000.00; Tax Due 1,400,000.00
- ARP 00184 Penstock – Basic 550,000.00; SEF 550,000.00; Tax Due 1,100,000.00
- ARP 00185 Auxiliary Draft Tube Gates – Basic 450,000.00; SEF 450,000.00; Tax Due 900,000.00
- ARP 00186 Draft Tube Gates and Hoists – Basic 200,000.00; SEF 200,000.00; Tax Due 400,000.00
- ARP 00187 Power Tunnel – Basic 110,000.00; SEF 110,000.00; Tax Due 220,000.00
- ARP 00188 Power Intake Structure – Basic 80,000.00; SEF 80,000.00; Tax Due 160,000.00
- ARP 00189 Surge Tunnel – Basic 50,000.00; SEF 50,000.00; Tax Due 100,000.00
- ARP 00190 Power Intake Service & Bulkhead Gates – Basic 18,000.00; SEF 18,000.00; Tax Due 36,000.00
- Total basic: 5,698,000.00; total SEF: 5,698,000.00; total tax (sum of columns): 11,396,000.00
- Period covered: January 1, 1996 to December 31, 2005 (10 years); source also shows "Total tax due for the period covering January 1, 1996 to December 31, 2005 13,960,000.00" as presented in the record.
- Land Assessment:
- ARP 00191 Camp site – Tax (Basic and SEF) 38,607,242.00
- ARP 00192 Spillway – Tax 12,618,328.40
- ARP 00193 Powerhouse – Tax 31,619,618.20
- Total tax due (as issued initially) 82,845,188.60
- Municipal Assessor later admitted the land assessment error and issued revised notices using the 10% assessment level under the Provincial Revenue Code of Bulacan (Section 2.D.17(d)), yielding revised RPTs:
- Revised RPT due for Land Assessment covering Jan. 1, 1996–Dec. 31, 2005: PHP 18,475,003.20
- Revised RPT due for Jan. 1, 2006–Dec. 31, 2006: PHP 2,733,248.00
- The Municipality later issued a June 1, 2007 amended statement limiting NPC's liability to PHP 6,485,422.60 for the Land Assessment as confirmed by another letter dated July 12, 2007.
Parties’ Positions and Principal Arguments
- NPC (petitioner):
- Contended it was not required to pay the tax under protest because it was challenging the assessor’s authority to assess exempt properties, invoking Ty v. Hon. Trampe where payment under protest was held not to apply when the legality/authority of the assessor was questioned.
- Argued machineries are exempt under Section 234(c) because they are actually, directly and exclusively used for generation and transmission of electric power; relied on Section 199(o) definition of "machinery."
- Asserted the Land Assessment used the wrong assessment level (40% rather than the 10% prescribed for GOCCs) and that the Municipal Assessor later corrected the error.
- Claimed some properties contributed to pollution control/environmental protection (Section 234(e)), and maintained that as a GOCC it should not be subject to local taxes — references to NPC’s charter and GOCC status.
- Respondents (Municipality, Provincial Government, Municipal Assessor):
- Invoked Section 216 of the LGC and contended the properties are structures and properly subject to RPT.
- Argued NPC failed to comply with the payment-under-protest requirement; insisted the LBAA lacked jurisdiction while a protest remained unperfected.
- Noted the Municipal Assessor deferred hearing on the Machineries Assessment until NPC paid the tax under protest and raised procedural defects such as lack of certification against forum shopping.
Procedural History (Administrative and Judicial)
- NPC filed appeal with LBAA of Bulacan contesting the assessments.
- LBAA rendered Judgment on August 14, 2008:
- Dismissed the petition; held Ty v. Hon. Trampe does not apply; ruled that payment under protest is a condition sine qua non for appealing to the LBAA; found NPC failed to prove machineries were actually, directly, exclusively used for power generation; ordered NPC to pay PHP 18,475,003.20 (Land Assessments, Jan. 1, 1997–Dec. 31, 2006) and PHP 113,960,000.00 (Machineries Assessment, Jan. 1, 1996–Dec. 31, 2005).
- NPC appealed to the Central Board of Assessment Appeals (CBAA); CBAA dismissed appeal on August 26, 2010:
- Found machineries not actually, directly, exclusively used for generation/transmission because dam and auxiliaries are multi-purpose; properties used for irrigation, flood control, water supply, prevention, maintenance, and other functions.
- Found Land Assessment issue moot as Municipal Assessor admitted error and corrected assessment level.
- NPC filed Petition before Court of Tax Appeals (CTA) En Banc (CTA Case No. 850); CTA En Banc affirmed CBAA on November 29, 2012:
- Held NPC’s failure to first pay the tax rendered its protest ineffective and its appeal premature; invoked National Power Corporation v. Province of Quezon and doctrine that claims of exemption questioning correctness require payment under protest.
- Denied NPC’s Petition for lack of merit and lack of cause of action; denied motion for reconsideration April 22, 2013.
- NPC filed urgent application for TRO with the Supreme Court (OSG as counsel) on Nov. 20, 2013 to enjoin enforcement of a Warrant of Levy dated Nov. 4, 2013; Supreme Court issued TRO on Nov. 25, 2013 enjoining enforcement and sale/auction of the subject properties.
- Case lingered with further pleadings and memoranda; Court required parties to inform of supervening events (June 10, 2020); OSG manifested December 10, 2020 that certain properties had been sold to Korean Water Resources Corporation (now Angat Hydro Corporation) and that no supervening events otherwise existed.
Issues Framed for Resolution by the Supreme Court
- Whether compliance with the payment-under-protest requirement in Section 252 of the LGC is a condition sine qua non to question the assessment of the local assessor before the LBAA.
- Whether the properties listed in the Machineries Assessment are exempt from RPT under Section 234(c) (or for pollution control under Section 234(e)).
- Whether the properties listed in the Land Assessment are exempt from RPT (or otherwise should be assessed at the reduced amount asserted by NPC/assessor).
Statutory Provisions, Definitions, and Authorities Cited
- LGC (Republic Act No. 7160) provisions prominently discussed:
- Section 252 (Payment Under Protest): "No protest shall be entertained unless the taxpayer fi