| Exemption: | You do not need to safeguard shafting that is in a room, vault, or similar space that contains only power transmission parts or equipment if the space: |
| • Is controlled by lock and key or has similarly restricted access that allows only authorized persons to enter. | |
| • Is well lit. | |
| • Has a dry, level, and firm floor. | |
| • Has a well-marked route with a vertical clearance of at least five feet six inches for authorized employees to follow to perform their duties. |