Cal. Bus. & Prof. Code § 1962
(b) An individual registered dental hygienist in alternative practice or a pair of registered dental hygienists in alternative practice who practice dental hygiene under a name that would otherwise violate Section 1960 may practice under that name if the licensees hold a valid permit issued by the dental hygiene board under this section. The dental hygiene board shall issue a written permit authorizing the holder to use a name specified in the permit in connection with the holder’s practice if the dental hygiene board finds all of the following: