Final answer:
The correct description for the Special Provision applying to UN1889, CYANOGEN BROMIDE, is that it should not come into direct contact with its means of containment during transportation to prevent container damage.
Step-by-step explanation:
The Special Provision that applies to UN1889, CYANOGEN BROMIDE, indicates that a person must not handle, offer for transport or transport these dangerous goods in a large means of containment if they are in direct contact with the large means of containment. This is to ensure that the dangerous chemical does not directly corrode or damage the containment, which could lead to leaks or spills during transportation. Cyanogen bromide, being a bromine-containing compound, shares some hazardous characteristics with other halogenated hydrocarbons, such as toxicity and environmental impacts. Consequently, safety regulations such as the United States Department of Transportation hazardous materials regulations are in place to oversee and manage the handling and transportation of such materials safely.