* For van-based buses, use the actual seating position if known, or use code "51" for the 2nd, 3rd & 4th rows, if actual seating position is unknown.
| 50-Others-sleeper section of cab |
| 51-Others-in enclosed cargo area |
| 52-Others-in unenclosed area |
| 54-Others-trailing unit |
| 55-Others-riding on vehicle exterior |