Section 604.101 - Certificate or Temporary Permit Required; Supervision(a) A person may not represent that the person is able to practice respiratory care or that the person is a respiratory care practitioner unless the person holds a certificate or temporary permit issued under this chapter.(b) A person may not practice respiratory care other than under the direction of a qualified medical director or other physician licensed by the medical board.Amended by Acts 2015, Texas Acts of the 84th Leg. - Regular Session, ch. 838,Sec. 2.161, eff. 9/1/2015.Amended by Acts 2015, Texas Acts of the 84th Leg. - Regular Session, ch. 1,Sec. 5.195, eff. 4/2/2015. Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. 9/1/1999.