Washington Revised Code Title 70. Public Health and Safety § 70.350.020. Authorization--Conditions

(i) A federal community health aide program certification board; or

(ii) A federally recognized Indian tribe that has adopted certification standards that meet or exceed the requirements of a federal community health aide program certification board;

(i) In a practice setting within the exterior boundaries of a tribal reservation and operated by an Indian health program;

(ii) In accordance with the standards adopted by the certifying body in (a) of this subsection, including scope of practice, training, supervision, and continuing education;

(iii) Pursuant to any applicable written standing orders by a supervising dentist; and

(iv) On persons who are members of a federally recognized tribe or otherwise eligible for services under Indian health service criteria, pursuant to the Indian health care improvement act, 25 U.S.C. Sec. 1601 et seq.