Government Code § 9412

Every person who, being summoned to attend as witness before the Senate, Assembly, or any committee, refuses or neglects, without lawful excuse, to attend pursuant to such summons, and every person who, being present before the Senate, Assembly, or any committee, wilfully refuses to be sworn, to answer any material and proper question, or to produce, upon reasonable notice, any material and proper books, papers, or documents in his possession or under his control is guilty of a misdemeanor.

Every member of the Legislature convicted of a misdemeanor under this section, in addition to the punishment prescribed, forfeits his office and is forever disqualified from holding any office in the State.