Relating to testimony or the production of evidence before a house of the legislature or a legislative committee.

SB 34 amends Texas law to require witnesses to testify or produce evidence before the state legislature or its committees, with limited exceptions. It prohibits witnesses from refusing testimony based on self-incrimination claims, but if they claim such a risk while testifying, their compelled testimony cannot be used against them in criminal cases (except for perjury charges). Witnesses also gain the right to have legal counsel present during testimony. The bill directly affects citizens, experts, and officials summoned to testify before Texas legislative bodies.