The accessible portion of abandoned fire alarm cables shall be removed. Where cables are identified for future use with a tag, the tag shall be __________

When identifying abandoned fire alarm cables that are tagged for future use, the most important aspect is the durability of the tag. It must be of sufficient durability to withstand the environmental conditions it will face. This ensures that the tag remains intact and legible over time, reducing the risk of confusion regarding the status of the cables. A durable tag is essential in maintaining safety and ensuring that future inspections or maintenance efforts are based on accurate information about the cables.

While the other options may address various aspects of labeling, the primary focus here is on the ability of the tag to endure environmental factors. A tag that deteriorates or is otherwise compromised could lead to misunderstandings about the cables' status and potentially create safety hazards or compliance issues. Thus, ensuring that the tag is durable is critical in this context.