A licensee shall at all times be responsible for ascertaining that those of his or her employees who are subject to registration are currently registered or have made proper application for registration as provided in this article. A licensee may not have in his or her employment a person whose registration has expired or been revoked, denied, suspended, or canceled.
Source:
Section 7583.19, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC§ionNum=7583.19..