| # | Letters of Interpretation |
|---|---|
| 1 | - 1910.165(b)(5) - Employee alarm systems. |
| 2 | - 1910.165(b)(4) - Employee emergency alarm systems. |
| 3 | - 1910.165(b)(3) - Employee emergency alarm systems. |
| 4 | - 1910.165(b)(2) - Employee emergency alarm systems. |
| 5 | - 1910.165(b) - Supervised manual fire alarm systems. |