37 Tex. Admin. Code § 28.4
A criminal justice or law enforcement agency or DNA laboratory may not collect, and the department may not accept, a blood sample or other specimen taken from a person who is not deceased, whether submitted voluntarily or as required by this chapter, unless the sample or specimen is collected in a medically approved manner by:
Source Note:The provisions of this §28.4 adopted to be effective June 27, 1996, 21 TexReg 5748.