California Code, Penal Code - PEN § 1473.6

(1) Newly discovered evidence of fraud by a government official that completely undermines the prosecution's case, is conclusive, and points unerringly to his or her innocence.

(2) Newly discovered evidence that a government official testified falsely at the trial that resulted in the conviction and that the testimony of the government official was substantially probative on the issue of guilt or punishment.

(3) Newly discovered evidence of misconduct by a government official committed in the underlying case that resulted in fabrication of evidence that was substantially material and probative on the issue of guilt or punishment.  Evidence of misconduct in other cases is not sufficient to warrant relief under this paragraph.

(1) The date the moving party discovered, or could have discovered with the exercise of due diligence, additional evidence of the misconduct or fraud by a government official beyond the moving party's personal knowledge.

(2) The effective date of this section.