Tex. Nat. Res. Code § 86.094

If unforeseen contingencies increase the demand for gas required by a distributor, transporter, or purchaser to an amount in excess of the total allowable production of the wells in a prorated reservoir to which the person is connected, the distributor, transporter, or purchaser may increase the person's take ratably from all these wells in order to supply the person's demand for gas, provided that notice of the increase and the amount of the increase are given to the commission within five days; and provided further, the commission shall adjust the inequality of withdrawals caused by the increase in fixing the allowable production of the various wells in the common reservoir or zone.