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Standard Interpretations(Archived) - Standard Number
- 1926.21 - Confined space standard for general industry. - 10/08/1993
- 1926.21 - Confined space standard for general industry. - 09/23/1993
- 1926.21 - Heat Initiative: Inspection Guidance - [OSHA Act of 1970 - Section 5(a)(1)] - 09/01/2021
- 1926.21 - OSHA does not cross reference general industry and construction standards. - 01/27/1994
- 1926.21(b)(2) - OSHA training Standards Policy Statement. - 04/17/2007
- 1926.21(b)(2) - Re-qualification requirements for mobile crane operators engaged in construction work. - 11/21/2008