The recent issuance of the Implementing Rules and Regulations (IRR) of the Philippine Ecosystem and Natural Capital Accounting System (PENCAS) Act by the Department of Human Settlements and Urban Development (DHSUD) marks an important milestone for environmental governance and land-use planning in the Philippines. For those of us who have long argued that development planning must finally reckon with the real value of ecosystems, this moment is both a validation and a turning point.
But it is important to be clear about what this development means—and what it does not.
The IRR is not the beginning of PENCAS compliance. It is the formal operationalization of a legal obligation that already existed.
PENCAS Was Already Law Before the IRR
Republic Act No. 11995, or the PENCAS Act, was signed into law on May 22, 2024. By its own effectivity clause—Section 17—the law took effect fifteen days after publication. From that point on, the policy direction of the law was already binding on government agencies and local governments alike.
The IRR, ceremonially signed on May 22, 2025 and officially published on October 17, 2025, did not create the obligation to comply with PENCAS. It merely provided the technical guidance, standards, and institutional coordination mechanisms to ensure consistent and systematic implementation.
This distinction matters. In Philippine law, the absence—or later issuance—of an IRR does not suspend the effectivity of a statute. The law commands; the IRR explains how to comply.
Why This Matters for Land-Use Planning
Land-use plans, particularly Comprehensive Land Use Plans (CLUPs) and zoning ordinances, are not historical documents. They are forward-looking instruments that shape development decisions for decades. They authorize what can be built, where it can be built, and—just as importantly—what should not be built at all.
Once PENCAS became law, government planners were already required to recognize ecosystems and natural capital as economic assets, not externalities. At the very least, this meant avoiding irreversible land-use decisions affecting forests, watersheds, protected areas, and other ecologically critical systems without accounting for their value.
Total silence or omission is not compliance.
Why the Cebu City CLUP Raised Red Flags
It is against this legal backdrop that concerns were raised over the Cebu City CLUP 2023–2032 and its accompanying zoning ordinance.
On December 15, 2025, amid DHSUD’s ongoing review of the CLUP, I filed a formal notice and reservation of objection addressed to DHSUD Secretary Jose Ramon Aliling. The purpose was straightforward: to seek a formal review of the plan on the ground that it was not compliant with the provisions of the PENCAS Act.
As I explained in interviews, including to InsiderPH, the objection was filed to flag planning risks arising from the failure to integrate natural capital accounting into land-use decisions—particularly those affecting ecologically critical areas. These were not technical quibbles. They were questions of law.
The argument that PENCAS could not be applied because its IRR had not yet been issued was never convincing. The law was already in force. The CLUP was still under review, endorsement, and intended implementation. These are continuing governmental acts that must comply with the law in force at the time of decision.
What the IRR Changes—and What It Confirms
The issuance of the IRR removes any remaining ambiguity. It now provides planners and reviewing agencies with concrete tools, standards, and coordination frameworks for ecosystem and natural capital accounting.
More importantly, it confirms what should have been clear from the start: that PENCAS is meant to be integrated into planning and decision-making, including CLUP review and approval. The IRR does not reset the clock. It strengthens the obligation.
For CLUPs and zoning ordinances that are still pending approval, refinement, or implementation, the path forward is now unmistakable. Compliance with PENCAS is no longer debatable—legally, administratively, or morally.
A Win for Law, Not a Loss for Development
This moment should not be framed as anti-development. On the contrary, it is a win for lawful, science-based, and future-oriented planning.
Development that ignores ecosystem value is not efficient; it is deferred cost. Flooding, landslides, water scarcity, and climate vulnerability are the downstream consequences of planning that treats nature as expendable. PENCAS simply asks us to account for what we have long taken for granted.
By issuing the IRR, DHSUD has taken a critical step toward aligning land-use planning with ecological reality. The next step is ensuring that pending and future plans—especially those governing highly urbanized and environmentally sensitive areas—are realigned accordingly.
Looking Forward
The challenge now is implementation with integrity. PENCAS should not be reduced to a box-ticking exercise or an annex buried in technical volumes. It must inform zoning decisions, constrain risky land conversions, and reshape how we define “development success.”
If this happens, then the issuance of the PENCAS IRR will not just be a bureaucratic milestone. It will be remembered as the moment when planning finally caught up with law, science, and common sense.
And that is a win worth declaring.
Real LexEcon 