#	Directives
1	07/01/2021 - 1926.651 - National - CPL 02-00-165 [CPL 02-00-087] - Compliance Directive for the Excavation Standard, 29 CFR 1926, Subpart P - PDF

#	Federal Register
1	05/04/2015 - 1926.651 - 80:25365-25526 - Confined Spaces in Construction; Final Rule - PDF
2	10/31/1989 - 1926.651 - 54:45894-45991 - Excavations; Construction; Trenching; Shoring; Sloping; Benching;Final Rule
3	02/23/1988 - 1926.651 - 53:5280-82 - Excavation
4	06/16/1987 - 1926.651 - 52:22799 - Excavation
5	04/15/1987 - 1926.651 - 52:12288-339 - Excavation
6	03/18/1974 - 1926.651 - 39:10216-23 - Excavation

#	Letters of Interpretation
1	05/11/2004 - 1926.651, 1926.651(c)(2) - Evaluation of the use of aluminum forms as an exit route from trench excavations
2	10/23/2003 - 1926.651, 1926.651(b)(2), 1926.651(b)(3) - Use of hydro-vacuum excavation equipment and other acceptable means to locate underground utility installions.
3	09/21/2001 - 1926.651(b)(2), 1926.651(b), 1926.651 - Clarification of utility "owner" as used in the Safety and Health Standards for Excavations, Underground Installations.
4	09/21/1995 - 1926.651 - Use of explosion proof certified equipment inside of pipes and manholes.
5	08/10/1995 - 1926.651, 1926.651(l), 1926.651(l)(1) - Fall protection requirements where employees are required or permitted to cross over excavations.
6	11/19/1991 - 1926.651 - Requirement for Air Sampling in trenches.
7	01/09/1991 - 1926.651 - Clarification of Standards

#	Regulations
1	03/14/2001 - 1926.651 - Specific Excavation Requirements.