No costs of corrective action incurred by an owner or operator at a facility on or after the date that the agency commences corrective action at the owner's or the operator's facility are allowable for reimbursement under this subchapter, unless authorized and the estimated costs preapproved in writing by the agency in accordance with this subchapter.     
     Source Note:        The provisions of this §334.321 adopted to be effective September 26, 1990, 15 TexReg 5209; amended to be effective March 25, 1993, 18 TexReg 1687; amended to be effective November 8, 1995, 20 TexReg 8800; amended to be effective November 23, 2000, 25 TexReg 11442