# Safety Standard for Preshift Examinations in Underground Coal Mines
> **Mine Safety and Health Administration** · Final rule. · Published 1999-08-19 · Effective 1999-10-18 · 64 FR 45165
## Document
- **Document number:** 99-21448
- **Category:** mine-safety
- **Sub-agency:** Mine Safety and Health Administration
- **Federal Register citation:** 64 FR 45165
- **CFR reference:** 30 CFR 75
- **Publication date:** 1999-08-19
- **Effective date:** 1999-10-18
## Abstract

We (MSHA) are amending the examination interval for preshift examinations of underground coal mines by requiring that mine operators conduct preshift examinations at 8-hour intervals. The rule clarifies when a preshift examination is required and the length of the shift covered by the preshift examination.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/08/19/99-21448/safety-standard-for-preshift-examinations-in-underground-coal-mines)
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