A dental hygienist is authorized to practice under general supervision when:
(1) In a dental office where the dental hygienist works, a dentist has diagnosed the condition to be treated and determined the procedure to be performed, or has authorized a dental hygienist to perform the prescribed treatment; or
(2) In an extended access oral health care setting, the supervising dentist has determined the dental hygiene procedures that may be performed and has issued written orders to a dental hygienist holding a license with an extended access dental hygiene endorsement to provide the authorized treatment. The supervising dentist shall be responsible to treat the patient’s dental needs or refer the patient to another dentist for treatment.