---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part52/subpartBBB"
level: "subpart"
label: "Subpart BBB"
heading: "Puerto Rico"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part52-subpartBBB"
sections_count: 13
---

# Subpart BBB — Puerto Rico

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter C — Air Programs › Part 52 — Approval and Promulgation of Implementation Plans

## Sections

- [§52.2720. Identification of plan.](/cfr/40/52.2720.md)
- [§52.2721. Classification of regions.](/cfr/40/52.2721.md)
- [§52.2722. Approval status.](/cfr/40/52.2722.md)
- [§52.2723. EPA-approved Puerto Rico regulations and laws.](/cfr/40/52.2723.md)
- [§52.2724. Reserved](/cfr/40/52.2724.md)
- [§52.2725. General requirements.](/cfr/40/52.2725.md)
- [§52.2726. Legal authority.](/cfr/40/52.2726.md)
- [§52.2727. Control strategy and regulations: Lead.](/cfr/40/52.2727.md)
- [§52.2728. Reserved](/cfr/40/52.2728.md)
- [§52.2729. Significant deterioration of air quality.](/cfr/40/52.2729.md)
- [§52.2730. Section 110(a)(2) infrastructure requirements.](/cfr/40/52.2730.md)
- [§52.2731. Control strategy and regulations: Sulfur oxides.](/cfr/40/52.2731.md)
- [§52.2732. Small business technical and environmental compliance assistance program.](/cfr/40/52.2732.md)