California Code, Code of Civil Procedure - CCP § 1218.5

(a) If the contempt alleged is for failure to pay child, family, or spousal support, each month for which payment has not been made in full may be alleged as a separate count of contempt and punishment imposed for each count proven.

(b) If the contempt alleged is the failure to pay child, family, or spousal support, the period of limitations for commencing a contempt action is three years from the date that the payment was due. If the action before the court is enforcement of another order under the Family Code, the period of limitations for commencing a contempt action is two years from the time that the alleged contempt occurred.