Final answer:
Container ships are the vessels that do not have to comply with the rule regarding traffic separation schemes to carry out their work. They have the ability to transfer ballast water internally among tanks to maintain stability.
Step-by-step explanation:
In the context of vessels and maritime regulations, the vessel that does not have to comply with the rule regarding traffic separation schemes to carry out its work is a container ship. Container ships have the ability to transfer ballast water internally among tanks to maintain stability during cargo operations, instead of discharging it. This practice allows containers to avoid conducting ballast water exchange in many circumstances.