650—22.5 (136C,153) Examination requirements. An applicant for dental assistant radiography qualification shall successfully pass a board-approved examination in dental radiography.
	 22.5(1) Examinations approved by the board are those administered by the board or board’s approved testing centers or, if taken after January 1, 1986, the Dental Assisting National Board Dental Radiation Health and Safety Examination.
	 22.5(2) A score of 75 or better on the board examination shall be considered successful completion of the examination. The board accepts the passing standard established by the Dental Assisting National Board for applicants who take the Dental Assisting National Board Radiation Health and Safety Examination.
	 22.5(3) Information on taking the examination may be obtained by contacting the board office at 400 SW 8th Street, Suite D, Des Moines, Iowa 50309-4687.
	 22.5(4) A dental assistant must meet such other requirements as may be imposed by the board’s approved dental assistant testing centers.
	 22.5(5) A dental assistant who fails to successfully complete the examination after two attempts will be required to submit, prior to each subsequent examination attempt, proof of additional formal education in dental radiography in a program approved by the board or sponsored by a school accredited by the Commission on Dental Accreditation of the American Dental Association.