30 Tex. Admin. Code § 18.30
A partial determination must be requested for all property that is in Part B of the figure in §18.25(a) of this title (relating to Equipment and Categories List) or that is not wholly used for pollution control. It is the responsibility of the applicant to propose a reasonable method for calculating a partial determination. The calculation must be documented and included with the application. It is the responsibility of the executive director to review the appropriateness of the proposed method and make the final determination.
Source Note:The provisions of this §18.30 adopted to be effective February 7, 2008, 33 TexReg 943.