California Code, Revenue and Taxation Code - RTC § 38578

(a) Notwithstanding Sections 706.071, 706.073, 706.080, 706.101, and 706.105 of the Code of Civil Procedure, the California Department of Tax and Fee Administration may serve earnings withholding orders for taxes and any other notice or document required to be served or provided in connection with an earnings withholding order for taxes according to Article 4 (commencing with Section 706.070) of Chapter 5 of Division 2 of Title 9 of Part 2 of the Code of Civil Procedure to government and private employers by electronic transmission or other electronic technology.

(b) Upon consent of the employer, the California Department of Tax and Fee Administration may provide service by electronic transmission or other electronic technology under this section.

(c) Notwithstanding Sections 706.071, 706.073, 706.080, 706.101, 706.125, and 706.126 of the Code of Civil Procedure, the California Department of Tax and Fee Administration may receive the employer's return, as described in Section 706.126 of the Code of Civil Procedure, by electronic transmission or other electronic technology.

(d) This section shall apply in the same manner and with the same force and effect and to the full extent as if this section had been incorporated in full into Article 4 (commencing with Section 706.070) of Chapter 5 of Division 2 of Title 9 of Part 2 of the Code of Civil Procedure.

(e) This section shall apply to notices served or provided on or after the effective date of the act  1 adding this section.