California Code Of Civil Procedure Section 2029.390
On or before January 1, 2010, the Judicial Council shall do all of the following: (a) Prepare an application form to be used for purposes of Section 2029.300. (b) Prepare one or more new subpoena forms that include clear instructions for use in issuance of a subpoena under Section 2029.300 or 2029.350. Alternatively, the Judicial Council may modify one or more existing subpoena forms to include clear instructions for use in issuance of a subpoena under Section 2029.300 or 2029.350.