---
kind: "unit"
title: "16"
title_heading: "Commercial Practices"
key: "chI/subchB"
level: "subchap"
label: "Subchapter B"
heading: "Guides and Trade Practice Rules"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/16/chI-subchB"
sections_count: 104
---

# Subchapter B — Guides and Trade Practice Rules

Title 16 C.F.R. — Commercial Practices › Chapter I — Federal Trade Commission

## Contents

- [Part 17 — Application of Guides in Preventing Unlawful Practices](/cfr/16/chI-subchB-part17.md)
- [Part 20 — Guides for the Rebuilt, Reconditioned, and Other Used Automobile Parts Industry](/cfr/16/chI-subchB-part20.md)
- [Part 23 — Guides for the Jewelry, Precious Metals, and Pewter Industries](/cfr/16/chI-subchB-part23.md)
- [Part 24 — Guides for Select Leather and Imitation Leather Products](/cfr/16/chI-subchB-part24.md)
- [Part 25-227 — Parts 25-227 [reserved]](/cfr/16/chI-subchB-part25-227.md)
- [Part 233 — Guides Against Deceptive Pricing](/cfr/16/chI-subchB-part233.md)
- [Part 238 — Guides Against Bait Advertising](/cfr/16/chI-subchB-part238.md)
- [Part 239 — Guides for the Advertising of Warranties and Guarantees](/cfr/16/chI-subchB-part239.md)
- [Part 240 — Guides for Advertising Allowances and Other Merchandising Payments and Services](/cfr/16/chI-subchB-part240.md)
- [Part 251 — Guide Concerning Use of the Word “free” and Similar Representations](/cfr/16/chI-subchB-part251.md)
- [Part 254 — Guides for Private Vocational and Distance Education Schools](/cfr/16/chI-subchB-part254.md)
- [Part 255 — Guides Concerning Use of Endorsements and Testimonials in Advertising](/cfr/16/chI-subchB-part255.md)
- [Part 259 — Guide Concerning Fuel Economy Advertising for New Automobiles](/cfr/16/chI-subchB-part259.md)
- [Part 260 — Guides for the Use of Environmental Marketing Claims](/cfr/16/chI-subchB-part260.md)