#	Letters of Interpretation
1	09/30/2021 - 1910.147(b) - Energy Isolation Device Requirements
2	01/25/2008 - 1910.147(b) - Use of a PLC system as an alternative measure which provides effective protection for minor servicing activities.
3	05/04/2007 - 1910.147(b) - Lockout/Tagout and the provisions for testing or positioning of machines while they are energized.
4	04/23/2007 - 1910.147(b) - Application of Control of Hazardous Energy (LOTO) requirements to compressed gas cylinders.
5	02/26/2007 - 1910.147(b) - Evaluation of the ElectroGuard disconnect system for use as an energy isolating device.
6	12/28/2006 - 1910.147(b) - Application of the Lockout/Tagout standard to die-setting activities and other machine setup operations.
7	08/25/2006 - 1910.147(b) - Several questions regarding OSHA's LOTO and Bakery standards 29 CFR 1910.147 and 1910.263.
8	04/22/2005 - 1910.147(b) - Lock out/Tag out (LOTO) requirements for die-setting operations in hydraulic power presses.
9	02/10/2004 - 1910.147(b) - Clarification of "authorized" and "affected" employees and proper energy control procedures.
10	12/16/1999 - 1910.147(b) - Use of Monitored Power Systems for lockout/tagout.