Wash. Admin. Code § 246-817-560
In addition to the acts allowed in WAC 246-817-520 and 246-817-550, a dentist may allow a dental hygienist licensed under chapter 18.29 RCW to perform the following acts under the dentist's close supervision:
(2) Administer local anesthetic agents and adjunctive procedures.
[Statutory Authority: RCW 18.32.0365 and 18.29.050. WSR 17-01-045, § 246-817-560, filed 12/13/16, effective 1/13/17. Statutory Authority: RCW 18.32.0365. WSR 06-14-018, § 246-817-560, filed 6/23/06, effective 7/24/06. Statutory Authority: RCW 18.32.035. WSR 95-21-041, § 246-817-560, filed 10/10/95, effective 11/10/95.]