California Code, Code of Civil Procedure - CCP § 706.072

(a) A “withholding order for taxes” is an earnings withholding order issued pursuant to this article to collect a state tax liability and shall be denoted as a withholding order for taxes on its face.

(b) A withholding order for taxes may only be issued under one of the following circumstances:

(c) In any case where a state tax liability has been assessed or determined prior to July 1, 1983, and the state determines that the requirement of subdivision (b) may not have been satisfied, the state may send a “Notice of Proposed Issuance of Withholding Order for Taxes” to the taxpayer at the taxpayer's last known address by first-class mail, postage prepaid. The notice shall advise the taxpayer that the taxpayer may have the assessment or determination reviewed by appropriate administrative procedures and state how such a review may be obtained. If the taxpayer is sent such a notice and requests such a review within 30 days from the date the notice was mailed to the taxpayer, the state shall provide appropriate administrative procedures for review of the assessment or determination and shall not issue the withholding order for taxes until the administrative review procedure is completed. If the taxpayer is sent such a notice and does not request such a review within 30 days from the date the notice was mailed to the taxpayer, the state may issue the withholding order for taxes.

(d) A withholding order for taxes may be issued whether or not the state tax liability has been reduced to judgment.