Any person conducting or operating a clinical laboratory may accept assignments for tests only from and make reports only to persons licensed under the provisions of law relating to the healing arts or their representatives. This section does not prohibit the acceptance of evaluation specimens for proficiency testing or referral of specimens or such assignment from one clinical laboratory to another clinical laboratory, either licensed or exempt under this chapter, providing the report indicates clearly the laboratory performing the test. A report of results issuing from a clinical laboratory shall show clearly the name and address of the laboratory and the name of the director.