California Code, Code of Civil Procedure - CCP § 708.020

(a) The judgment creditor may propound written interrogatories to the judgment debtor, in the manner provided in Chapter 13 (commencing with Section 2030.010) of Title 4 of Part 4, requesting information to aid in enforcement of the money judgment. The judgment debtor shall answer the interrogatories in the manner and within the time provided by Chapter 13 (commencing with Section 2030.010) of Title 4 of Part 4.

(b) The judgment creditor may not serve interrogatories pursuant to this section within 120 days after the judgment debtor has responded to interrogatories previously served pursuant to this section or within 120 days after the judgment debtor has been examined pursuant to Article 2 (commencing with Section 708.110), and the judgment debtor is not required to respond to any interrogatories so served.

(c) Interrogatories served pursuant to this section may be enforced, to the extent practicable, in the same manner as interrogatories in a civil action.

(d) The limitation provided by Chapter 13 (commencing with Section 2030.010) of Title 4 of Part 4 on the number of interrogatories that may be propounded applies to each set of interrogatories propounded from time to time pursuant to this section, but does not apply cumulatively to interrogatories propounded by the judgment creditor to the judgment debtor.