6 Colo. Code Regs. § 1007-1-2-B
2B1 Each Qualified Expert who designs or evaluates shielding for a radiation machine used in the healing arts as regulated by Part 6, but not used in radiation therapy, and is designated as a QE(R), or each Qualified Expert who designs or evaluates shielding for a radiation machine used in radiation therapy, and is designated as a QE(T) shall:
2B.1.1 Have current certification in health physics or a subfield of medical physics by:
2B.1.1.1 The American Board of Medical Physics; or
2B.1.1.2 The American Board of Health Physics; or
2B.1.1.3 The Canadian College of Medical Physics; or
2B.1.1.4 The American Board of Radiology in a radiological physics category; or
2B.1.1.5 American Board of Nuclear Medicine Science; or
2B.1.2 Has current certification in an equivalent specialty board recognized by the Department, and;
2B.1.2.1 Has provided written documentation that the individual:
(1) Holds a master or doctorate degree from an accredited college or university in physics, biophysics, radiological physics, health physics, or medical physics; and
(2) Has satisfactorily completed 2 years of training and work experience acceptable to the Department that includes one year of documented, fulltime training in the appropriate field under the supervision of a qualified expert.
6 CCR 1007-1-2-B