California Code, Business and Professions Code - BPC § 1262

No clinical laboratory scientist's or limited clinical laboratory scientist's license shall be issued by the department except after examination;  provided, that a temporary clinical laboratory scientist's license or a temporary limited clinical laboratory scientist's license may be issued to an individual who fulfills the requirements for admission to the examination unless the individual has failed a previous examination for the license.  The department may issue licenses without examination to applicants who have passed examinations of the national accrediting boards whose requirements are equal to or greater than those required by this chapter and regulations established by the department.  The department may issue licenses without further examination to applicants who have passed examinations of another state whose laws and regulations are equal to or greater than those required by this chapter and regulations established by the department.  The evaluation of national or state accrediting boards for the purposes of this chapter shall be carried out by the department with assistance of representatives from the licensed groups.  This section shall not apply to persons who have passed an examination by a national board or another state examination prior to the establishment of requirements that are equal to or exceed those of this chapter or the regulations of the department.  The department may, however, make exceptions if individuals are otherwise qualified.