Code of Civil Procedure § 1990
CHAPTER 2. Means of Production
A person present in Court, or before a judicial officer, may be required to testify in the same manner as if he were in attendance upon a subpoena issued by such Court or officer.
CHAPTER 2. Means of Production
A person present in Court, or before a judicial officer, may be required to testify in the same manner as if he were in attendance upon a subpoena issued by such Court or officer.