https://regulations.justia.com/regulations/fedreg/agencies/department-of-labor/mine-safety-and-health-administration/2013/09/23?registers=between Thu, 02 May 2024 01:18:51 -0700 Thu, 02 May 2024 01:18:51 -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/2013/09/23?registers=between https://regulations.justia.com/regulations/fedreg/2013/09/23/2013-23031.html https://regulations.justia.com/regulations/fedreg/2013/09/23/2013-23031.html Mon, 23 Sep 2013 00:00:00 -0700 2013-23031 Proposed Rule http://www.gpo.gov/fdsys/pkg/FR-2013-09-23/pdf/2013-23031.pdf