MERALCO Rate Case: Supreme Court Upholds ERC’s Shift to Performance-Based Regulation

The Supreme Court has affirmed the Energy Regulatory Commission’s (ERC) authority to set electricity distribution rates under the Performance-Based Regulation (PBR) methodology, a framework that replaced the older Rate of Return Base (RORB) system. In National Association of Electricity Consumers for Reforms (NASECORE) v. Manila Electric Company (MERALCO), decided on October 10, 2016, the Court ruled that challenges to administrative regulations must be raised directly, not collaterally, and that a Commission on Audit (COA) audit was no longer required after the shift to PBR. The ruling clarifies how utility rates are set and underscores the limits on consumer groups challenging regulatory frameworks.

The Dispute: Consumer Groups vs. MERALCO’s Rate Approvals

Petitioners NASECORE, the Federation of Village Associations (FOVA), and the Federation of Las Piñas Village Associations (FOLVA) questioned the validity of MERALCO’s distribution rates set under the PBR methodology. They argued that PBR was inconsistent with the Electric Power Industry Reform Act of 2001 (EPIRA) and that the ERC should have revisited assumptions about MERALCO’s rate of return. They also insisted that a complete COA audit was a prerequisite before approving the rate applications.

MERALCO had filed applications to translate its approved Annual Revenue Requirement (ARR) into distribution rates for the 2007-2011 regulatory period. The ERC approved the applications with adjustments, and the Court of Appeals (CA) affirmed. The petitioners then elevated the case to the Supreme Court.

From RORB to PBR: How Rate-Setting Changed

Initially, the ERC used the RORB methodology, which set rates to recover historical costs plus a reasonable return. In 2003, the ERC shifted to PBR through Resolution No. 4, Series of 2003. PBR controls prices through an average price cap mechanism, limiting the average revenue per kilowatt-hour a utility can earn within a specified period.

The ERC later issued Resolution No. 12-02, Series of 2004 (the Distribution Wheeling Rate Guidelines) and Resolution No. 39, Series of 2006 (the Rules for Setting Distribution Wheeling Rates). These rules set a maximum price cap on distribution wheeling rates, and MERALCO was among the first utilities to enter the PBR system.

Collateral Attack: Why the Challenge Failed

The Supreme Court emphasized that administrative regulations have the force of law and enjoy a presumption of constitutionality and legality. Such regulations cannot be attacked collaterally—meaning they cannot be questioned in a proceeding where the primary issue is something else.

Here, the petitioners challenged the PBR methodology in the context of specific rate applications, not through a direct proceeding questioning the validity of the ERC’s rules. The Court noted that the proceedings involved the translation of the Maximum Annual Price into distribution rates, a step that came after the adoption of PBR. Moreover, the petitioners had ample opportunity to object during public consultations but failed to do so. The ERC’s earlier decision in ERC Case No. 2006-045 RC had become final and executory, and the petitioners could no longer question it.

Questions of Fact and the COA Audit Issue

The Court also held that the petitioners’ claim that the rates were unreasonable raised questions of fact, which are generally not reviewable in a petition for review on certiorari under Rule 45 of the Rules of Court. Rate-fixing involves technical examination and specialized review, which are best left to the expertise of the administrative authority.

On the COA audit, the Court clarified that the directive in the Lualhati case applied to MERALCO’s rates under the RORB system. Because PBR uses projections of operating and capital expenditures rather than historical costs, the shift to PBR was a supervening circumstance that rendered the COA audit requirement moot and academic.

Practical Takeaways

• Challenge regulations directly. Administrative rules like the ERC’s PBR guidelines must be questioned in a direct proceeding, not collaterally in a rate case.
• Participate in public consultations. Failure to raise objections during ERC hearings may be treated as a waiver of the right to question the methodology later.
• Know the limits of Rule 45 petitions. Questions of fact, such as the reasonableness of rates, are generally not reviewable by the Supreme Court in a petition for review on certiorari.
• Understand the shift from RORB to PBR. Under PBR, rates are based on projected costs and capped by an average price mechanism, unlike the historical-cost approach of RORB.
• COA audit requirements may become obsolete. A prior directive for a COA audit may no longer apply if the regulatory framework has fundamentally changed.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.