California Labor Code

Sec. § 130


The appeals board and each of its members, its secretary, assistant secretaries, and workers’ compensation judges, may administer oaths, certify to all official acts, and issue subpoenas for the attendance of witnesses and the production of papers, books, accounts, documents and testimony in any inquiry, investigation, hearing or proceeding in any part of the state.
Source

Last accessed
Jun. 6, 2016