# | Standard Interpretations |
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1 | - 1926.551 - Hooking and Unhooking Loads with a Helicopter During Work on Electric Transmission Systems |
2 | - 1926.551 - Line maintenance on a de-energized transmission line. |
# | Regulations |
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1 | - 1926.551 - Helicopters. |
# | Federal Register |
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1 | - 1926.551 - 37:24880 - Helicopters |