A dental hygienist who holds a Board recognition to monitor a patient to whom nitrous oxide has been administered may, on and after October 1, 2016, continue to monitor a dentist’s administration of nitrous oxide to a patient, but may not administer nitrous oxide to a patient unless the dental hygienist holds a recognition to administer nitrous oxide. A dental hygienist who is recognized to monitor a patient to whom nitrous oxide has been administered may not increase the nitrous levels. The supervising dentist shall discharge the patient upon completion of the procedures. Beginning on October 1, 2016, the Board may not issue a recognition to monitor nitrous oxide. A dental hygienist may not administer nitrous oxide to a patient unless recognized by the Board as being qualified to do so as provided in this chapter.