| # | Letters of Interpretation |
|---|---|
| 1 | - 1910.253(b)(5)(ii)(D) - Safety of Compressed Gas Cylinders on Portable Carts |
| 2 | - 1910.253(b)(5)(ii)(D) - Use of the "Regulator Umbrella" for "in use" or "connected for use" conditions for portable compressed gas cylinders. |
| 3 | - 1910.253(b)(5)(ii)(D) - Interpretation of "special truck" as identified in 1910.252(a)(2) (v)(b)(4) |