Which source would provide information about the safe use of slings?

The correct choice is the sling tag, as it is specifically designed to provide crucial details about the safe use of slings. Sling tags typically include important information such as the manufacturer's specifications, rated capacities, care instructions, inspection criteria, and safety guidelines directly related to the specific sling being used. This makes the sling tag an essential resource for ensuring that users follow the correct procedures for safe operation and maintenance.

While the manufacturer's guidelines, local regulations, and safety certifications are all valuable sources of information regarding slings, they do not provide the immediate, specific information that a sling tag offers for that particular piece of equipment. The sling tag is more tailored and relevant to the specific sling in use, making it the optimal choice for anyone needing information about safety practices related to that sling.