https://regulations.justia.com/regulations/fedreg/agencies/department-of-labor/mine-safety-and-health-administration/2012/09/28?registers=between Fri, 03 May 2024 14:55:08 -0700 Fri, 03 May 2024 14:55:08 -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/2012/09/28?registers=between https://regulations.justia.com/regulations/fedreg/2012/09/28/2012-23852.html https://regulations.justia.com/regulations/fedreg/2012/09/28/2012-23852.html Fri, 28 Sep 2012 00:00:00 -0700 2012-23852 Notice http://www.gpo.gov/fdsys/pkg/FR-2012-09-28/pdf/2012-23852.pdf