Cal. Bus. & Prof. Code § 5561
All accusations against licensees charging the holder of a license issued under this chapter with the commission of any act constituting a cause for disciplinary action shall be filed with the board within five years after the board discovers, or through the use of reasonable diligence should have discovered, the act or omission alleged as the ground for disciplinary action, whichever occurs first, but not more than 10 years after the act or omission alleged as the ground for disciplinary action. However, with respect to an accusation alleging a violation of Section 5579, the accusation may be filed within three years after the discovery by the board of the alleged facts constituting the fraud or misrepresentation prohibited by Section 5579.
Ca. Bus. and Prof'l. Code § 5561