Section 319.303 - Tampering with Specimen(a) Except as otherwise provided by this section, a person may not tamper with or adulterate or attempt to tamper with or adulterate a specimen taken for testing under this chapter.(b) This section does not apply to a person who adds a substance approved by the executive secretary necessary to preserve the specimen for analysis.16 Tex. Admin. Code § 319.303
The provisions of this §319.303 adopted to be effective August 14, 1989, 14 TexReg 3805; amended to be effective November 1, 1998, 23 TexReg 10640; amended to be effective March 1, 2003, 28 TexReg 1638