While my knowledge base doesn't contain specific documentation on tool tethering regulations and guidelines, I can provide general safety guidance based on industry best practices for preventing dropped objects and ensuring workplace safety.

To prevent dropped objects and ensure workplace safety, consider the following guidelines:

• Secure Tools: Always secure tools and equipment against accidental displacement when working at heights. This can be achieved by using tool lanyards or tethers.
• Overhead Protection: Implement measures to protect workers below from falling objects. This may include providing overhead protection or barring other construction processes below steel erection.
• Proper Housekeeping: Maintain a clean and organized work environment to prevent tripping hazards and ensure that tools and materials are stored properly.
• Regular Inspections: Regularly inspect tools and equipment for wear and tear, and replace them when necessary. Blunt or dull tools can compromise safety and increase the effort needed to use them.
• Training: Provide workers with comprehensive training on tool safety, including the proper use of tool tethers and other safety measures.