A witness appearing pursuant to a subpoena or a subpoena duces tecum, other than a party, shall receive for the appearance the following mileage and fees, to be paid by the party at whose request the witness is subpoenaed:
(a)
The same mileage allowed by law to a witness in a civil case.(b)
The same fees allowed by law to a witness in a civil case. This subdivision does not apply to an officer or employee of the state or a political subdivision of the state.
Source:
Section 11450.40, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=11450.40..