6 Colo. Code Regs. § 1007-1-7L
Except as provided in Appendix 7P, the licensee shall require the authorized of strontium-90 for ophthalmic radiotherapy to be a physician who:
7L1 Is an authorized user under Appendix 7K or equivalent NRC or Agreement State requirements;
or
7L2
7L2.1 Has completed 24 hours of classroom and laboratory training applicable to the medical use of strontium-90 for ophthalmic radiotherapy. The training must include:
(1) Radiation physics and instrumentation;
(2) Radiation protection;
(3) Mathematics pertaining to the use and measurement of radioactivity; and
(4) Radiation biology;
and
7L2.2 Supervised clinical training in ophthalmic radiotherapy under the supervision of an authorized user at a medical institution, clinic, or private practice that includes the use of strontium-90 for the ophthalmic treatment of five individuals. This supervised clinical training must involve:
(1) Examination of each individual to be treated;
(2) Calculation of the dose to be administered;
(3) Administration of the dose; and
(4) Follow-up and review of each individual's case history;
and
7L3.3 Has obtained written attestation, signed by a preceptor authorized user who meets the requirements in Appendix 7P, Appendix 7K, Appendix 7L, or equivalent NRC or Agreement State requirements, that the individual has satisfactorily completed the requirements of 7L2.1 and 7L2.2 and is able to independently fulfill the radiation safety-related duties as an authorized user of strontium-90 for ophthalmic use.
6 CCR 1007-1-7L