The correct answer is C) Only when the tags have been removed by an authorized person. This is the correct answer because DANGER tags are used to indicate that a piece of equipment is unsafe to operate and should not be used until it has been properly repaired or serviced. The DANGER tag can only be removed by an authorized person, such as a maintenance technician or supervisor, who has verified that the equipment is safe to operate again. Operating equipment with a DANGER tag still attached would be a violation of safety protocols and could put personnel at risk. The other answer choices are incorrect because they do not properly adhere to the regulations and procedures for handling equipment with DANGER tags. A break in maintenance activity does not make it safe to operate, personal judgment should not override safety protocols, and a supervisor cannot simply grant permission to override a DANGER tag.