Cal. Bus. & Prof. Code § 1924
A person licensed as a registered dental hygienist who has completed the prescribed classes through the Health Manpower Pilot Project (HMPP) and who has established an independent practice under the HMPP by June 30, 1997, shall be deemed to have satisfied the licensing requirements under Section 1922, and shall be authorized to continue to operate the practice he or she presently operates, so long as he or she follows the requirements for prescription and functions as specified in Sections 1922, 1925, 1926, 1927, 1928, 1930, and 1931, and subdivision (b) of Section 1929, and as long as he or she continues to personally practice and operate the practice or until he or she sells the practice to a licensed dentist.
Ca. Bus. and Prof'l. Code § 1924