Which of the following serves as the current edition of regulation documents for CNG and LNG?

The current edition of regulation documents for Compressed Natural Gas (CNG) and Liquefied Natural Gas (LNG) is crucial for drivers and operators to ensure compliance with safety and operational standards. The designation of "current edition" indicates that it represents the most updated and authoritative source of regulations that are applicable to CNG and LNG transportation, operations, and facilities.

Regulations can change due to new safety data, technological advancements, or shifts in environmental standards. Therefore, relying on the most recent version ensures that drivers and companies are adhering to the latest legal requirements, safety protocols, and best practices.

This awareness and adherence are vital for operational safety and legal compliance, and understanding these regulations helps in minimizing risks associated with the transportation of CNG and LNG. While other specified options suggest outdated or anticipatory guidelines, they do not provide the necessary authoritative basis that the current edition offers, hence they are not suitable references for current operational needs.