CFR > Title 42 - Public Health > CHAPTER IV—CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER G—STANDARDS AND CERTIFICATION (parts 482 to 498) > PART 493—LABORATORY REQUIREMENTS > SUBPART M—Personnel for Nonwaived Testing (§493.1351 to §493.1495) > 493.1355—Condition: Laboratories performing PPM procedures; laboratory director.