| As a management level engineering officer on a motor vessel equipped with engines capable of burning both high sulfur content residual fuels and low sulfur content distillate fuels, on approaching arrival to a US port, when would you plan for the fuel changeover to be accomplished? |
| A) When entering the SOx emission control area set by local authorities. |
| B) When entering US territorial boundaries 12 miles from the coastline. |
| C) When entering the US economic exclusion zone 200 miles from the coastline. |
| D) When entering US navigable waters 3 miles from the coastline. |
