California Code, Penal Code - PEN § 993

(a) At the arraignment of a defendant who is charged with a felony and who is, or whom the court reasonably deems to be, the sole custodial parent of one or more minor children, the court shall provide the following to the defendant:

(b) If the defendant states, orally or in writing, at the arraignment that the defendant is a sole custodial parent of one or more minor children, the court may reasonably deem the defendant to be a sole custodial parent of one or more minor children without further investigation. The court may, but is not required to, make that determination on the basis of information other than the defendant's statement.