(a) Except as provided in subsection (c), any licensed physician and surgeon or osteopathic physician and surgeon who uses or supervises the use of an X-ray bone densitometer (XBD) shall possess an X-ray bone densitometry supervisor and operator permit. The permit shall be valid only for the particular bone densitometer the physician and surgeon was trained to use, and for any other XBD that meets all of the following criteria only if the physician and surgeon has completed training, as specified in section 30466(a)(5)(C), for the use of that particular XBD. The authorized activity, as specified in section 30461(e), covered by the permit shall be limited to the use of an XBD that:

(b) The physician and surgeon shall, upon request, provide evidence of training pursuant to section 30466(a)(5)(C) for any XBD used or supervised by the physician and surgeon.

(c) An X-ray bone densitometry supervisor and operator permit is not required of any licensed physician and surgeon who holds a current and valid radiology supervisor and operator certificate or radiography supervisor and operator permit.