|(a) The provisions of this section do not apply to a person who is certified or registered under the Act, a practitioner, a registered nurse, a physician assistant, or other licensed or certified person who is authorized to operate a bone densitometry unit which utilizes x-radiation. (b) A person who operates a bone densitometry unit(s) which utilizes x-radiation who is in compliance with this section is not required to obtain a hardship exemption as long as the person is not performing radiologic procedures other than bone densitometry. (c) A person who operates a bone densitometry unit(s) which utilizes x-radiation must have proof that the person is a certified densitometry technologist in good standing with the International Society for Clinical Densitometry (ISCD), or have successfully completed the ARRT bone density exam or has completed at least 20 hours of training as follows: (1) 16 hours of specific training using bone densitometry equipment utilized x-radiation, presented by a medical radiologic technologist (MRT) or an equipment applications specialist knowledgeable of the specific equipment to be utilized; and (2) 4 hours of radiation safety and protection training for the patient, operator and others. The training shall be presented by an MRT or a licensed medical physicist. A person must complete the 4 hours of radiation safety and protection training every 2 years. (d) Documentation of operator training must be kept on site.