Art. 1.21. PRIVILEGE OF LEGISLATORS.  Senators and Representatives shall, except in cases of treason, felony or breach of the peace, be privileged from arrest during the session of the Legislature, and in going to and returning from the same, allowing one day for every twenty miles such member may reside from the place at which the Legislature is convened.
Acts 1965, 59th Leg., vol. 2, p. 317, ch. 722.