# UL standard — Certification marks and hazardous-area classifications: cross-market equivalences

For UL standard, market / system is US; meaning is a published set of best practices for testing and evaluating the safety, security, and sustainability of a product or system; administered by is UL Standards & Engagement; mandatory / voluntary is Standards are voluntary but can become mandatory and legally binding if referenced in adopted code, written into law, or required by a government agency like the U.S. Consumer Product Safety Commission, recorded from its source on 2026-08-11.

- **Designation:** UL standard
- **Market / system:** US
- **Meaning:** a published set of best practices for testing and evaluating the safety, security, and sustainability of a product or system
- **Administered by:** UL Standards & Engagement
- **Mandatory / voluntary:** Standards are voluntary but can become mandatory and legally binding if referenced in adopted code, written into law, or required by a government agency like the U.S. Consumer Product Safety Commission _(verified: appears in the quote below)_

## What the source says

> Standards are voluntary but can become mandatory and legally binding if referenced in adopted code, written into law, or required by a government agency like the U.S. Consumer Product Safety Commission

## Source

- https://ulse.org/standards/

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Certification marks and hazardous-area classifications: cross-market equivalences](https://referencesource.org/certification-standards-equivalence/).