#	Letters of Interpretation
1	08/06/2007 - 1910.146(c)(7) - Whether reclassification is available for permit-required confined spaces with potentially hazardous atmospheres.
2	12/02/2005 - 1910.146(c)(7)(i) - Clarification of "potential atmospheric hazard" when reclassifying a PRCS as a non-permit required confined space.
3	12/02/2005 - 1910.146(c)(7), 1910.146(c)(7)(i) - Clarification of "potential atmospheric hazard" when reclassifying a PRCS as a non-permit required confined space.
4	12/02/2002 - 1910.146(c)(7)(iv) - Applicability of the confined-space standard to dock-leveler pits.
5	12/02/2002 - 1910.146(c)(7)(iii) - Applicability of the confined-space standard to dock-leveler pits.
6	12/02/2002 - 1910.146(c)(7)(ii) - Applicability of the confined-space standard to dock-leveler pits.
7	12/02/2002 - 1910.146(c)(7)(i) - Applicability of the confined-space standard to dock-leveler pits.
8	12/02/2002 - 1910.146(c)(7), 1910.146(c)(7)(i), 1910.146(c)(7)(ii), 1910.146(c)(7)(iii), 1910.146(c)(7)(iv) - Applicability of the confined-space standard to dock-leveler pits.
9	10/27/1995 - 1910.146(c)(7) - Guidance in determining whether elevator pits meet the definition of confined spaces.
10	08/25/1995 - 1910.146(c)(7) - Requirements for PRCS attendants; Fall arrest system anchorage point
11	09/19/1994 - 1910.146(c)(7) - Elevator industry employees working in and around pits and equipment.
12	11/15/1993 - 1910.146(c)(7) - Permit-Required Confined Spaces: metal container curing ovens.