United States Postal Service (USPS) Regulations and Information
Current Regulations applicable to residential and commercial mailbox installations
Regulation | Description |
USPS Standards 7C | Applicable to all curbside mailbox installation - Effective September 2015 |
USPS Standards 4B/4B+ | Applicable to all 4B/4B+ both Vertical and Horizontal Installations (New, replacement and/or retrofit) - Effective October 2006 |
USPS Standards 4C | Applicable to all new and replacement installations |