# Electronic Detonators; Correction
**AGENCY:**
Mine Safety and Health Administration, Labor.
**ACTION:**
Direct final rule; correction.
**SUMMARY:**
The Mine Safety and Health Administration (MSHA) is correcting a footnote in the preamble of a direct final rule that appeared in the *Federal Register* on January 14, 2020 and that became effective on March 16, 2020. The direct final rule revised certain safety standards for explosives at metal and nonmetal mines.
**DATES:**
Effective May 20, 2020.
**ADDRESSES:**
*Federal Register Publications:* Access rulemaking documents electronically at *https://www.msha.gov/regulations/rulemaking* or *http://www.regulations.gov* [Docket Number: MSHA-2019-0007].
*Email Notification:* To subscribe to receive email notification when MSHA publishes rulemaking documents in the *Federal Register* , go to *https://www.msha.gov/subscriptions.*
**FOR FURTHER INFORMATION CONTACT:**
Roslyn B. Fontaine, Acting 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:**
In FR Doc. 2019-28446 appearing on page 2022 in the *Federal Register* of Tuesday, January 14, 2020, the following correction is made: On page 2023, in the third column, under II. Background, A. General Discussion, footnote 1 is corrected to read:
“MSHA considers detonators fired by a shock tube and incorporating a pre-programmed microchip delay rather than a pyrotechnic one to be non-electric detonators, not electronic detonators.”
David G. Zatezalo,
Assistant Secretary of Labor for Mine Safety and Health Administration.