Final answer:
Nurses have to qualify for specialties by working a certain number of hours, but they can choose not to practice in that specialty.
Step-by-step explanation:
Nurses have to qualify for certain specialties by working a certain number of hours in that specific role, but they are not required to practice in that specialty. For example, a nurse may work a certain number of hours in the emergency room to qualify as an ER nurse, but they may choose to work in a different area, like pediatrics or oncology.