(a) Until July 1, 2011, accreditation, must be based on an environmental testing laboratory's conformance to National Environmental Laboratory Accreditation Conference standards approved June 2003 and the requirements of this chapter.
(b) After June 30, 2011, accreditation must be based on an environmental testing laboratory's conformance to the most current standards adopted by the National Environmental Laboratory Accreditation Program and the requirements of this chapter.

Source Note: The provisions of this §25.9 adopted to be effective September 12, 2002, 27 TexReg 8480; amended to be effective August 24, 2005, 30 TexReg 4841; amended to be effective July 19, 2006, 31 TexReg 5640; amended to be effective October 7, 2010, 35 TexReg 8930