650—22.3 (136C,153) Exemptions. The following individuals are exempt from the requirements of this chapter.
	 22.3(1) A student enrolled in an accredited dental, dental hygiene, or dental assisting program, who, as part of the student’s course of study, applies ionizing radiation.
	 22.3(2) A person registered as a dental assistant trainee pursuant to 650—Chapter 20, who is engaging in on-the-job training in dental radiography and who is using curriculum approved by the board for such purpose.