This is another controversy between operators with wells qn large tracts and those with wells on small tracts in the Appling Gas Field in Calhoun and Jackson Counties. Substantially the same parties have been before us on two previous occasions. In the first case it was held that each of the vertically separated reservoirs underlying the Field was to be considered as a separate reservoir in determining the right tq a Rule 37 exception. The action of the Railroad Commission in allowing a small tract operator to make multiple completions from a single well bore in the gas sands under her property was upheld, even though production from one sand would have enabled her to recover more than the quantity of gas under her land. Benz-Stoddard v. Aluminum Company of America, Tex.Sup., 368 S.W.2d 94. In the second case it was held that the large tract operators were precluded by lapse of time from attacking the ½-⅜ formula established by the Commission for allocating production from the Field, even though use of the formula allowed the wells on small tracts to drain substantial quantities of gas from the larger units. Railroad Commission of Texas v. Aluminum Company of America, Tex.Sup., 380 S.W.2d 599. The question to be decided now is whether the Commission may, for the purpose of protecting correlative rights, establish a ceiling on the monthly allowable of gas to be produced from a reservoir.
By Special Order No. 2-53,009 dated February 1, 1965, the Commission prescribed a formula to be used in determining the maximum reasonable market demand for five reservoirs in the Appling Field. This suit was instituted by Woods Exploration & Producing Co., Inc. et al. against the Commission to test the validity of the order and enjoin its enforcement. Ben Novak and others who are interested in small tract wells intervened as plaintiffs, while Aluminum Company of America and other large tract operators intervened and aligned themselves with the Commission. After the trial court rendered summary judgment in favor of the plaintiffs, declaring the order invalid and enjoining the Commission from enforcing the same, the Commission and the large tract operators prosecuted a direct appeal to this Court as authorized by Article 1738a.1
The question presented for decision is relatively narrow, but a rather full statement is necessary to an understanding of the contentions made by the parties. Section 12 of Article 6008 provides that the Commission shall fix the monthly allowable of gas to be produced from a reservoir “at the lawful market demand therefor or at the volume that can be produced from *315such reservoir without waste, whichever is the smaller quantity.” It then directs that the monthly reservoir allowable be allocated among the wells entitled to produce from the reservoir so as to give each well its fair share of the gas to be produced, with the proviso that each well shall be restricted to the amount of gas that can be produced without waste. These and other provisions of Article 6008 will be adverted to later in this opinion.
The usual procedure for fixing the monthly gas allowable for a reservoir is set out in Statewide Rule 31. Under its provisions market demand is ordinarily determined primarily on the basis of Producers’ Forecasts filed with the Commission by operators having wells completed in the reservoir. These nominations state the volume of gas which each producer expects to be able to market from his wells the following month, and an operator may forecast any amount he desires provided it does not exceed the delivery capacity of his wells. If the Commission concludes that use of the forecasts does not result in a correct determination of reasonable market demand for the reservoir, it takes into account other pertinent facts such as average production for the previous twelve months or nominations filed by purchasers of gas. The power to do so is expressly recognized by Statewide Rule 31.
Under the provisions of Article 6008 mentioned above and where waste is not involved, market demand as determined by the Commission becomes the monthly reservoir allowable. The allocation formula applicable to the field is then used to divide the reservoir allowable among the wells entitled to produce from the reservoir. In the case of the Appling Field, this is the i/3-¾ formula we refused to strike down in Railroad Commission of Texas v. Aluminum Company of America, supra. Subject to any inequities inherent in the allocation formula, each well thus receives its fair share of the gas produced provided all wells are capable of producing their al-lowables. A well incapable of producing the allowable that would normally be assigned to it is known as a limited capacity well. Under prevailing Commission procedures, limited capacity wells are assigned the maximum allowables they can produce, and the remainder of the allowables they would otherwise be entitled to receive are allocated to other wells in the field.2 This brings us to the problem dealt with by the Commission in its Special Order No. 2-53,009. There is no dispute as to any of the material facts. Waste is not involved in the case, and there is nothing in the record to suggest that any gas produced from the Appling Field has been devoted to unlawful uses.
As indicated above there are a number of vertically separated reservoirs in the Appling Field. Five of these reservoirs are covered by the Commission’s order here in issue. One of them, the Middle Kop-nicky, is the deepest and by far the largest and most productive reservoir in the Field. It originally contained more than 360 billion cubic feet of gas. Each of the other four reservoirs covered by the order overlies the Middle Kopnicky and originally contained between 3 and 4½ billion cubic feet of gas. Under Rule 37 exceptions granted by the Commission, appellees and other town lot lessees were permitted to drill numerous wells on small tracts, most of them containing approximately Vio of an acre, and to make multiple completions from a single well bore in each of the several reservoirs underlying their lots.
The small tract wells have delivery capacities similar to those of the wells located on large tracts. A 1961 study disclosed that drainage was taking place from the Middle Kopnicky to the smaller upper zone sands through well bore communication in the *316wells with multiple completions. This well bore communication distorted the producing capability of the upper zone well completions and thus enabled the operators to file forecasts far in excess of what the true delivery capacity of the wells would have been in the absence of such communication. It had that effect because, as pointed out above, the amounts of the forecasts are limited only by the delivery capacities of the wells.
The i/3-¾ allocation formula in itself gave the small tract wells a tremendous drainage advantage over the larger gas units. Prior to the adoption of the order now in question, the Commission determined that operators of many wells on small tracts were following the practice of filing forecasts at or near the full delivery capacity of their wells. These forecasts, when combined with those filed by other operators and handled in accordance with the usual Commission procedure outlined in Statewide Rule 31, resulted in the assignment of very large reservoir allow-ables. The reservoir allowables were so great that the large tract wells, even though they had normal or even maximum delivery capacities, were incapable of producing the allowables representing their fair share of the gas as determined by allocation formula. They were accordingly classified as limited capacity wells and assigned the maximum allowables they were capable of producing; the remainder of the allow-ables to which they were entitled under the allocation formula was reallocated among the town lot wells. This enabled the latter to produce far more of the reservoir allowable than their share as determined by the basic ½-⅜ allocation formula, and the drainage advantage which the small tract operators already enjoyed by virtue of the formula itself was thus substantially enhanced.
An example will serve to illustrate the problem. One of the reservoirs in the Appling Field is designated as Segment 5, 7500', and 18 wells were completed therein. Seventeen of these wells were located on 7.132 acres, while the remaining well was situated on a 328-acre unit. Since the 17 small tract wells have a large aggregate delivery capacity, their operators were able to make correspondingly large forecasts for the month of July, 1964. The total delivery capacity of all 18 wells was approximately 898,000 MCF per month, and the production forecasts resulted in the determination that reasonable market demand, and hence the reservoir allowable, for the month was approximately 880,000 MCF. Under the basic ½-⅜ allocation formula, the large tract well was entitled to an allowable of 591,000 MCF, but the productive capacity of the best well completed in the reservoir was approximately 87,000 MCF per month. The productive capacity of the single large tract well was only about 34,000 MCF, and in accordance with the usual Commission procedures some 557,000 MCF were allocated to the town lot wells for the one month in addition to their shares of the reservoir allowable as determined by application of the ½-⅜ formula.
Aluminum Company of America requested the Commission to amend Statewide Rule 31 as applied to the Appling Field by either (1) establishing a formula for computing the maximum quantity of gas that might constitute market demand for a reservoir, or (2) discontinuing the practice of reallocating the excess allowables of limited capacity wells. The Commission chose the first alternative and entered Special Order No. 2-53,009 adopting Field Rule 11, the relevant portions of which are quoted in the margin.3 This is the order *317now under attack. Its effect is to establish as a ceiling on reasonable market demand the quantity of gas which, when fixed as the monthly reservoir allowable, would permit the well on the largest proration unit, if its delivery capacity were equal to the largest delivery capacity of any well in the reservoir, to receive an allowable it would be capable of producing.
It is unnecessary for us to consider some of the arguments advanced by appel-lees in support of the trial court’s judgment. As we view the case, the basic issue is whether the procedure for determining maximum market demand established by Rule 11 is beyond the authority delegated to the Commission by the Legislature in Article 6008. Appellees rely primarily upon the provisions of Section 12 mentioned above. It is their contention that the statute requires the Commission to determine lawful market demand and then, where waste is not involved, set the reservoir allowable at the amount of the market demand so determined. They insist that Rule 11 is invalid because it fixes an arbitrary limit based upon factors which have nothing to do with market demand.
Appellants emphasize Sections 1 and 22 of Article 6008, which provide as follows:
“Sec. 1. In recognition of past, present, and imminent evils occurring in the production and use of natural gas, as a result of waste in the production and use thereof in the absence of correlative opportunities of owners of gas in a common reservoir to produce and use the same, this law is enacted for the protection of public and private interests against such evils by prohibiting waste and compelling ratable production.
“Sec. 22. The Commission shall be vested with a broad discretion in administering this law, and to that end shall be authorized to adopt any and all rules, regulations or orders which it finds are necessary to effectuate the provisions and purposes of said law.”
They say that the remainder of the statute, and particularly the sections upon which appellees rely, must be construed in the light of these provisions. Since the declared purpose of the law is the protection of public and private interests by prohibiting waste and compelling ratable production, they contend that the Commission may properly consider the protection of correlative rights as one of the relevant factors in determining reasonable market demand. The Commission takes the position, therefore, that reasonable market demand is the total figure that allows each operator to produce his fair and allocated share of gas from a common reservoir within the framework of the existing allocation formula. Appellants further insist that the reservoir allowable and the individual well allocations are necessarily intertwined and constitute inseparable parts of a single whole. They point out that a reservoir allowable is not reasonable if it results in unreasonable well allocations, and from this premise they argue that the determination of reasonable market demand must be left to the discretion of the Commission so that unique situations such as that existing in the Appling Field can be handled through special regulation.
Appellants make a strong case for granting the Commission power to consider correlative rights in establishing a reasonable reservoir allowable, but our problem is to determine whether the Legislature has done so. From a reading of Article 6008 and other statutes in pari materia *318therewith, we agree with appellants that the term “lawful market demand” as used in_the third and fourth sentences of Section 12 means reasonable market demand for lawful uses. After considering all the provisions of Article 6008, however, it seems clear to us that the Legislature did not intend to authorize production from a reservoir to be limited to less than reasonable market demand except for the prevention of waste.4
Section 10 of the statute makes it the duty of the Commission to regulate daily gas well production “in the manner and method herein set forth.” The Commission is then directed in general terms to prorate and regulate production for the protection of public and private interests in the prevention of waste and the adjustment of correlative rights, but the Legislature did not stop with this general grant of authority. Section 11 tells us when the powers granted by Section 10 may be exercised. The Commission is instructed there to regulate and prorate production for the protection of correlative rights “when evidence introduced at a hearing to be held as herein provided will support a finding made by the Commission” that potential production is in excess of reasonable market demand. This is a rather clear indication of the legislative intent that the Commission is not to be concerned with correlative rights unless it does make such a finding. It thus appears that the Commission was not intended to have the broad authority and discretion suggested by the provisions of Sections 1 and 22.
The second sentence of Section 12 provides that when the Commission finds that waste exists or is imminent or that the productive capacity of the wells exceeds market demand, it “shall then proceed by proper order to prorate and regulate the gas production from such reservoir on a reasonable basis.” If the Legislature had intended for the Commission to fix as the reservoir allowable any amount that might be reasonable under all the circumstances, Section 12 probably would not have gone beyond the first two sentences. See Rudman v. Railroad Commission of Texas, 162 Tex. 579, 349 S.W.2d 717. Instead of stopping at that point, however, the lawmakers spelled out in some detail how the Commission’s duty to regulate gas production is to be performed. It is directed to determine each month: (1) the lawful market demand for gas to be produced from the reservoir during the following month; and (2) the volume of gas that can be produced from the reservoir and from each well therein during such month without waste. The statute then provides in plain language that the monthly reservoir allowable of gas shall be fixed at the lawful market demand therefor or at the volume that can be produced without waste, whichever is *319the smaller quantity. In allocating the reservoir allowable among the wells, the Commission is authorized by Section 13 to consider the size of the tracts, the productive capacity of the wells, and “all other factors which are pertinent.” It seems rather significant then that the Commission was not given similar authority in fixing the reservoir allowable.
The Legislature undoubtedly contemplated that each well would receive its fair share of the gas produced, but it also specified the means by which that end is to be accomplished. In our opinion the fixing of the reservoir allowable is controlled by the clear and explicit terms of Section 12, and the authority granted to the Commission in that respect is not enlarged by the more general provisions of Sections 1 and 22. “The correction or relaxation of the Section 12 requirements is a legislative matter if the allowables fixed by the Commission pursuant thereto are seriously fallible.” Rudman v. Railroad Commission of Texas, supra.
In adopting the order now in question, the Commission has set an arbitrary limit on reasonable market demand for gas from the reservoir and hence upon the reservoir allowable. The limit is based upon factors which have nothing to do with market demand, and we agree with the trial court that the order is beyond the power delegated to the Commission by the Legislature. Appellants point out that Rule 11 will serve to reduce or eliminate any distortion in the reservoir allowables resulting from well bore communication or exorbitant forecasts, but this is purely incidental. The formula prescribed thereby is not related in any way to the quantity of gas passing between the reservoirs or to the amount by which the forecasts might be regarded as excessive.
We do not mean to suggest that reasonable market demand must always be fixed at the mathematical total of the Producers’ Forecasts for the month. Use of these nominations is merely an administrative device, and the Commission may consider and give appropriate weight to all facts that are relevant to a determination of reasonable market demand.
Appellants cite Railroad Commission of Texas v. Rowan Oil Co., 152 Tex. 439, 259 S.W.2d 173, Corzelius v. Harrell, 143 Tex. 509, 186 S.W.2d 961, and Brown v. Humble Oil & Refining Co., 126 Tex. 296, 83 S.W.2d 935, 87 S.W.2d 1069, 101 A.L.R. 1393. The opinions in these cases contain general expressions regarding the discretion vested in the Commission and its power to regulate production to protect correlative rights, but none of them throws any light on the question now before us. Appellants also direct our attention to the opinion in Benz-Stoddard, where it was said that the validity of Rule 37 and the exception thereto is based upon the principle that the Railroad Commission can so regulate the flow of gas that no unreasonable hardship need result from its application. We adhere to that view, but this Court is not authorized to enlarge the powers granted to the Commission by the Legislature.
It is also argued that the summary judgment was improper because there is no showing that the reservoir allowable determined for any month by use of the procedure provided in Rule 11 was less than the actual reasonable market demand for that month. Appellants cite Railroad Commission of Texas v. Houston Natural Gas Corp., 155 Tex. 502, 289 S.W.2d 559, as supporting this argument. In that case a rate established by the Commission was attacked as confiscatory, and we held that the manner in which the Commission arrived at its results was not material if the rate actually yielded a fair return. The decision might be in point if the present-suit had been brought for the purpose of questioning the reservoir allowable fixed for a particular month, but here we are concerned with an order which prescribes the use of an illegal method for determining the allowable at all times in the future. The order is subject to attack even though *320the reservoir allowable calculated in accordance with its provisions for a certain month might not be substantially more or less than the reasonable market demand for gas from the reservoir.
The judgment of the trial court is affirmed.
. All statutes are referred to by the article number under which they appear in Vernon’s Annotated Texas Civil Statutes.
. Appellees say, and appellants do not deny, that this method of determining the amount each well may produce is expressly sanctioned and required by the provisions of Rule 5, which established the ⅝- % allocation formula for the Appling Field.
. “Rule 11: a. The reasonable market demand for the Appling, Segment 5, 7500'; the Appling, Segment 6, 7500'; the Ap-pling, Segment 6, 7600'; the Appling, Segment 6, 7600', Lower; and the Appling, Segment ‘A’ Kopnicky, Middle Fields, Jackson and Calhoun Counties, Texas, shall be allocated to each well in. each field in accordance with the allocation formula for such field.
b. The daily reasonable market demand for gas for each of the mentioned fields *317shall be the lesser gas volume figure as determined either by summation of nominated volumes taken from producers’ forecasts, or by dividing the reported productive capability as shown on the GWT-2 test of the well exhibiting the greatest ability to deliver gas to normal gathering facilities by the participation factor of the largest proration unit.
c. The monthly reasonable market demand for gas shall be determined by multiplying the daily reasonable market demand by the number of days in the month.”
. This conclusion is further supported by the history of our oil and gas conservation laws. The first Texas statute prohibited waste and authorized the Commission to “do all things necessary for the conservation of oil and gas.” Acts 1919, 36th Leg., p. 285, eh. 155. It was only after extended controversy that the Legislature adopted the so-called “Market Demand Act” in 1932. Acts 1932, 42nd Leg., 4 C.S., p. 3, ch. 2. This was preceded by the “Anti-Market-Demand Act,” which provided that waste “shall not be construed to mean economic waste, and the Commission shall not have power to attempt by order, or otherwise, directly or indirectly, to limit the production of oil to equal the existing market demand for oil.” Acts 1931, 42nd Leg., 1 C.S., p. 46, ch. 26. Governor Sterling is reported to have declared that he would veto a bill which authorized limitation of production to reasonable market demand, because he was interested only in preventing physical waste and could not see how limitation of production to reasonable market demand would have the effect of preventing waste. See Hardwicke, Legal History of Proration of Oil Production in Texas, Texas Law Review, 1937 Bar Association Number, p. 99. Against this background, it is rather difficult to believe that when the Legislature finally authorized the Commission to limit production to reasonable market demand, it meant that an even lower figure might be set whenever the Commission concluded that the same would constitute a reasonable reservoir allowable under all the circumstances.