Cal. Bus. & Prof. Code § 1205
As used in this chapter, "trainee" means a person licensed under this chapter for the purpose of receiving comprehensive practical experience and instruction in clinical laboratory procedures in one of the sciences or in general clinical laboratory science under the direct and responsible supervision of a person authorized to direct a laboratory under the provisions of this chapter, clinical laboratory scientist, clinical chemist scientist, clinical microbiologist scientist, clinical toxicologist scientist, clinical immunohematologist scientist, clinical genetic molecular biologist scientist, clinical cytogeneticist scientist, clinical histocompatibility scientist, clinical laboratory geneticist scientist, clinical reproductive biologist scientist, or other equivalent licensee in the science or specialty or subspecialty for which the person is licensed in a clinical laboratory certified for this purpose by the department under this chapter.
Ca. Bus. and Prof. Code § 1205