View all text of Subjgrp 166 [§ 57.6600 - § 57.6605]
§ 57.6604 - Precautions during storms.
During the approach and progress of an electrical storm—
(a) Surface blasting operations shall be suspended and persons withdrawn from the blast area or to a safe location; or
(b) Underground electronic or electrical blasting operations that are capable of being initiated by lightning shall be suspended and all persons withdrawn from the blast area or to a safe location.