Texas Natural Resources Code - NAT RES § 102.014. Productive Acreage Equal to Standard Proration Unit

(a) The commission shall not require the owner of a mineral interest, the productive acreage of which is equal to or in excess of the standard proration unit for the reservoir, to pool his interest with others unless requested by the holder of an adjoining mineral interest, the productive acreage of which is smaller than such pattern, who has not been provided a reasonable opportunity to pool voluntarily.

(b) If the conditions specified in Subsection (a) of this section exist, the commission shall pool the smaller tract with adjacent acreage on a fair and reasonable basis and may authorize a larger allowable for the unit if it exceeds the size of the standard proration unit for the reservoir.