A person who, being subpoenaed to attend as a witness before either house of the legislature or any committee thereof, knowingly fails or refuses without lawful excuse to attend pursuant to such subpoena, or being present knowingly refuses to be sworn or to answer any material or proper question, or to produce, upon reasonable notice, any material and relevant books, papers or documents in his possession or under his control, is guilty of a class 2 misdemeanor.
A.R.S. § 41-1154