Cal. Code of Civil Procedure - CCP § 2028.010. Section 2028.010.
Any party may obtain discovery by taking a deposition by written questions instead of by oral examination. Except as modified in this chapter, the procedures for taking oral depositions set forth in Chapters 9 (commencing with Section 2025.010) and 10 (commencing with Section 2026.010) apply to written depositions.
