GOV §11450.20: (a) Subpoenas and subpoenas duces tecum shall be issued by the agency or presiding officer at the request of a party, or by the attorney of record for a party, in accordance with Sections 1985 to 1985

(a) Subpoenas and subpoenas duces tecum shall be issued by the agency or presiding officer at the request of a party, or by the attorney of record for a party, in accordance with Sections 1985 to 1985.4, inclusive, of the Code of Civil Procedure. (b) The process extends to all parts of the state and shall be served in accordance with Sections 1987 and 1988 of the Code of Civil Procedure. A subpoena or subpoena duces tecum may also be delivered by certified mail return receipt requested or by messenger. Service by messenger shall be effected when the witness acknowledges receipt of the subpoena to the sender, by telephone, by mail, or in person, and identifies himself or herself either by reference to date of birth and driver’s license number or Department of Motor Vehicles identification number, or the sender may verify receipt of the subpoena by obtaining other identifying information from the recipient. The sender shall make a written notation of the acknowledgment. A subpoena issued and acknowledged pursuant to this section has the same force and effect as a subpoena personally served. Failure to comply with a subpoena issued and acknowledged pursuant to this section may be punished as a contempt and the subpoena may so state. A party requesting a continuance based upon the failure of a witness to appear at the time and place required for the appearance or testimony pursuant to a subpoena, shall prove that the party has complied with this section. The continuance shall only be granted for a period of time that would allow personal service of the subpoena and in no event longer than that allowed by law. (c) No witness is obliged to attend unless the witness is a resident of the state at the time of service.