Del. Code Ann. tit. 16, § 3011A
(a) An individual may not be engaged in work as a central service technician in a health-care facility and a health-care facility may not employ an individual as a central service technician unless the individual has passed a nationally-accredited central service exam for central service technicians and holds and maintains 1 of the following credentials:
The certification requirement provided in subsection (a) of this section shall not apply to an individual employed or otherwise working as a central service technician in a health-care facility as of January 1, 2023.