# Materials requiring Associate Administrator approval (Special Provision 131) — Postal shipping restrictions by item category

For Materials requiring Associate Administrator approval (Special Provision 131), carrier is US DOT (49 CFR, all modes); restriction type is restricted; scope is transportation in commerce (US); conditions is This material may not be offered for transportation unless approved by the Associate Administrator, recorded from its source on 2026-08-10.

- **Item category:** Materials requiring Associate Administrator approval (Special Provision 131) _(verified: appears in the quote below)_
- **Carrier:** US DOT (49 CFR, all modes) _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** transportation in commerce (US) _(our reading, not quoted from the source)_
- **Conditions:** This material may not be offered for transportation unless approved by the Associate Administrator. _(verified: appears in the quote below)_

## What the source says

> This material may not be offered for transportation unless approved by the Associate Administrator.

## Source

- https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-172/subpart-B

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).