(a) Each production area authorization must establish the amount of financial assurance for aquifer restoration of the production area based upon cost estimates provided under §331.143 of this title (relating to Cost Estimate for Plugging and Abandonment and Aquifer Restoration) approved by the executive director.
(b) Each area permit or production area authorization must establish the amount of financial assurance for plugging and abandonment of the injection wells, production wells, recovery wells, monitor wells, and baseline wells of the permit area or production area based upon cost estimates provided under §331.143 of this title approved by the executive director.

Source Note: The provisions of this §331.109 adopted to be effective March 12, 2009, 34 TexReg 1638