Which of the following is a requirement for a dentist to administer nitrous oxide?

A dentist administering nitrous oxide must ensure that the procedures align with established safety and professional standards, which is why the presence of a licensed dentist in the operatory is vital. This requirement ensures that there is a qualified professional overseeing the use of nitrous oxide during dental procedures, which includes monitoring the patient's condition and managing any potential complications.

The dentist must have a comprehensive understanding of how nitrous oxide interacts with patients and respond appropriately if any issues arise. The presence of a licensed dentist ensures that the administration is conducted correctly and safely, maintaining a high standard of patient care and safety protocols.

While certification in first aid, completion of a specialized nitrous oxide course, and annual refresher courses can enhance a dentist's ability to act safely and effectively in emergencies or with new techniques, these are not universally mandated requirements for the administration of nitrous oxide. Rather, the critical requirement revolves around the direct involvement of a licensed dentist in the operatory to ensure safe practices are followed.