https://regulations.justia.com/regulations/fedreg/agencies/department-of-labor/mine-safety-and-health-administration/2020/12/18?registers=between Tue, 21 May 2024 15:20:58 -0700 Tue, 21 May 2024 15:20:58 -0700 Justia Regulations Tracker Copyright 2011 Justia Inc. https://regulations.justia.com/images/justiafedregulations.gif https://regulations.justia.com/regulations/fedreg/agencies/department-of-labor/mine-safety-and-health-administration/2020/12/18?registers=between https://regulations.justia.com/regulations/fedreg/2020/12/18/2020-27929.html https://regulations.justia.com/regulations/fedreg/2020/12/18/2020-27929.html Fri, 18 Dec 2020 00:00:00 -0800 2020-27929 Notice https://www.govinfo.gov/content/pkg/FR-2020-12-18/pdf/2020-27929.pdf