What is not permissible at the site of an accident without investigation approval?

Disturbing the scene in any significant way is not permissible at the site of an accident without investigation approval because it can compromise the integrity of the evidence. Preserving the original conditions allows investigators to accurately understand what happened and identify contributing factors. Any alterations can lead to the loss of critical information that might be vital for safety assessments, legal considerations, or process improvements.

Maintaining the accident scene intact until a thorough investigation is completed is crucial for accountability and to ensure that safety protocols can be effectively reviewed and improved. In contrast, moving equipment, collecting evidence, or taking photographs may be permitted under certain conditions, often with oversight or after obtaining consent from relevant authorities, as they facilitate the investigative process rather than hinder it.