# Petitions for Modification of Application of Existing Mandatory Safety Standards; Correction
**AGENCY:**
Mine Safety and Health Administration, Labor.
**ACTION:**
Notice; correction.
**SUMMARY:**
The Mine Safety and Health Administration published a notice in the *Federal Register* of June 25, 2021, that concerned summaries of three petitions for modification. The notice contained incorrect docket numbers used to identify the respective petitions.
**FOR FURTHER INFORMATION CONTACT:**
Jessica D. Senk, Director, Office of Standards, Regulations, and Variances, MSHA, at *[email protected]* (email), 202-693-9440 (voice), or 202-693-9441 (fax). These are not toll-free numbers.
**SUPPLEMENTARY INFORMATION:**
**Correction**
In FR Doc. 2021-13544, appearing on page 33773 in the *Federal Register* of June 25, 2021, the following corrections are made under II. Petitions for Modification:
1. On page 33773, in the second column, the “ *Docket Number:* M-2021-016-C.” is corrected to read “ *Docket Number:* M-2021-019-C.”
2. On page 33775, in the second column, the “ *Docket Number:* M-2021-017-C.” is corrected to read “ *Docket Number:* M-2021-020-C.”
3. On page 33777, in the second column, the “ *Docket Number:* M-2021-018-C.” is corrected to read “ *Docket Number:* M-2021-021-C.”
Dated: June 28, 2021.
Jessica Senk,
Director, Office of Standards, Regulations, and Variances.