# Discrimination Against Employees Exercising Rights Under the Williams-Steiger Occupational Safety and Health Act of 1970
> **Occupational Safety and Health Administration** · Final interpretive rule. · Published 2021-09-03 · Effective 2021-09-03 · 86 FR 49472
## Document
- **Document number:** 2021-19071
- **Category:** osha-workplace-safety
- **Sub-agency:** Occupational Safety and Health Administration
- **Federal Register citation:** 86 FR 49472
- **CFR reference:** 29 CFR 1977
- **Publication date:** 2021-09-03
- **Effective date:** 2021-09-03
- **DOL docket:** Docket Number: OSHA-2021-0002
## Abstract

The Occupational Safety and Health Administration (OSHA) is amending one of the rules interpreting the anti-retaliation provision of the Occupational Safety and Health Act of 1970 (OSH Act or Act) to clarify that the test for showing a nexus between protected activity and adverse action is "but-for" causation.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/09/03/2021-19071/discrimination-against-employees-exercising-rights-under-the-williams-steiger-occupational-safety)
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