Comprehensive and Detailed Step-by-Step Explanation:

Labeling Hazardous Materials:

PerNFPA 704 (Standard System for the Identification of the Hazards of Materials for Emergency Response)and OSHA regulations, hazardous materials must haveconspicuous marking or labelingthat meets recognized national standards.

Purpose of Conspicuous Marking:

Clear identification ensures emergency responders, workers, and occupants can recognize and handle hazardous materials safely.

Other Options Explained:

Option A (No special identification):Incorrect; labeling is mandatory.

Option B (Unique color coding):While color coding is part of the system, it mustalign with national standards, not a unique system.

Option D (Owner’s requirements):Owner-specific markings may not comply with NFPA or OSHA standards.

Summary:Hazardous material containers must haveconspicuous marking or labeling meeting national standards.