---
kind: "unit"
title: "26"
title_heading: "Internal Revenue"
key: "chI/subchG"
level: "subchap"
label: "Subchapter G"
heading: "Regulations under Tax Conventions"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/26/chI-subchG"
sections_count: 58
---

# Subchapter G — Regulations under Tax Conventions

Title 26 C.F.R. — Internal Revenue › Chapter I — Internal Revenue Service, Department of the Treasury

## Contents

- [Part 500-507 — Parts 500-507 [reserved]](/cfr/26/chI-subchG-part500-507.md)
- [Part 509 — Switzerland](/cfr/26/chI-subchG-part509.md)
- [Part 510-512 — Parts 510-512 [reserved]](/cfr/26/chI-subchG-part510-512.md)
- [Part 513 — Ireland](/cfr/26/chI-subchG-part513.md)
- [Part 514 — France](/cfr/26/chI-subchG-part514.md)
- [Part 515-520 — Parts 515-520 [reserved]](/cfr/26/chI-subchG-part515-520.md)
- [Part 521 — Denmark](/cfr/26/chI-subchG-part521.md)
- [Part 522-599 — Parts 522-599 [reserved]](/cfr/26/chI-subchG-part522-599.md)