As the name of the plaintiff indicates, it is a club, and during the period from August 26,1924, to and including July 23,1928, paid taxes on dues and initiation fees collected from its members in the amount of $178,916.-24. It now brings suit for this amount with interest, alleging that these taxes were unlawfully collected. The issue in the ease is whether the plaintiff was subject to tax as a soeial or athletic club, the determination of which depends partly upon the construction of the statute imposing taxes on social оr athletic clubs and partly upon whether the facts in the ease bring it within the proper construction of the statute.

It is insisted -on behalf of the plaintiff that the evidence shows that the predominant purpose of the club is not sоcial but civic and philanthropic, and that this fact is sufficient to show that it is exempt from the tax. This contention is in effect that the regulations laid down by the Bureau of Internal Revenue stating under what circumstances a club may be rеgarded as subject to the tax are not authorized by the statute which imposes it.

We think it is too late now to raise this objection. These regulations were promulgated in 1917 when the statute first went into force. Ever since they have been applied by the courts as laid down and no court has even intimated that they were not authorized under a proper construction of the statute. More than fifteen years have elapsed since the regulatiоns were first announced. During all this period the regulations have remained substantially the same, and Congress, although well aware of the construction which was being placed on the statute by the bureau and by the courts, has several times re-enacted the law imposing the tax. It is well settled that where there has been a long-continued construction of a statute by an executive department charged with its administration which has been approved by thе courts, repeated 're-enactment of a statute without substantial change may be treated as implied approval of this construction and purpose on the part of Congress to continue the law in forcе as so construed. The authorities directly or indirectly supporting this rule are so numerous that without citing the decisions we shall hold that the rule applies to the case at bar.

Article 36 of the regulations states: “The tax does not attach to dues or fees * * * merely because it [the club] has incidental social features, but, ‍​​‌‌‌​‌​‌‌​​​​​​‌‌‌‌​‌​​‌​‌‌​‌​‌​‌‌‌​‌‌‌‌‌‌‌‌​‌‌‍if the social features are a material purpose of the organization, then it is a 'social * * * club or organization’ within the meaning of the act.”

This court has taken this regulation for its guidance in all of the cases which come before it and for the reasons stated above we shall continue to apply it as a correct construction of the statute. The effect of its application is to make the decision in the eases which have come before the court turn on the question of whether the social features of the club involved were merely incidental or *936 whether, on the other hand, they are a material purpose of the organization. This is .largely a question of fact although it depends to some extent upon the construction of the word “incidental” as used in the regulations.

We doubt whether there is much to be gained by attempting to define the word “incidental,” especially when under some definitions we come back to the original word. For example, one of the dietionary definitions of “incidental” is “casual” and one of -the dictionary definitions of “casual” is “incidental.” Nevertheless, we think the meaning of the word “incidental” as used in the regulations is well understood and not difficult to apply. An examination оf the eases which we have decided will show that in all instances where the social features were few and insignificant, or immaterial to its purposes, as shown by its activities, the soeial features have been held to be mеrely incidental and the club not subject to the tax. In eases where it appeared that the club did not conduct, promote, or facilitate any activities of a soeial nature, or for social purposes, it wоuld seem manifest that the organization could not be held to be a soeial club and the court so ruled. On the other hand, where the soeial features were numerous and important to the club and especially where thеy were necessary to its existence or prosperity, we have uniformly held the club to be taxable as a social club. As often happens, it is possible to cite instances where expressions contained in the opinions of this court detached from the body of the opinion might seem not to be uniform, but when the ease as a whole is considered, and especially the facts upon which the judgment was rendered, a consistent apрlication of the rule laid down in the regulations mil always be found.

In the Aldine Club Case, 65 Ct. Cl. 315, it appeared that the club was merely a luncheon club and that it carried on no activities in the way of entertainment or recreation. The nearest approach to anything ‍​​‌‌‌​‌​‌‌​​​​​​‌‌‌‌​‌​​‌​‌‌​‌​‌​‌‌‌​‌‌‌‌‌‌‌‌​‌‌‍of the kind was some lectures given on instructional topics by distinguished public men. Athletics and sports were entirely ignored. The Bankers’ Club Case, 37 F.(2d) 982, 69 Ct. Cl. 121, involved another organization for restaurant purposes having no activities for recreation or entertainment. In neither of these cases were there any activities for purely social purposes. In the Chemists’ Club Case, 64 Ct. Cl. 156, and the Cosmos Club Case, 42 F.(2d) 321, 70 Ct. Cl. 366, it was found that the club had some slight facilities for recreаtion but whatever social features there were were immaterial to and remote from the predominant purpose. In the Washington Club Case, 49 F.(2d) 656, 69 Ct. Cl. 621, it appeared that there were a few soeial features, but in the opinion, from which one judge dissented, it was said that the social features were clearly incidental and subordinate to the predominant purposes of the club. The Builders’ Club Case, 58 F.(2d) 503, 74 Ct. Cl. 595, was another in which it appeared that althоugh the club had some facilities for recreation and places where the members met and conversed with each other it held no meetings and conducted no ‍​​‌‌‌​‌​‌‌​​​​​​‌‌‌‌​‌​​‌​‌‌​‌​‌​‌‌‌​‌‌‌‌‌‌‌‌​‌‌‍activities for purely social purposes, and it was hеld that the soeial relations were merely incidental to the predominant purpose of the club which was not social. The Houston Club Case, 58 F.(2d) 487, 74 Ct. Cl. 640, was much the same. The club carried on no soeial activities. The club maintained a dining room but its activities were restricted to the business welfare of the community. It conducted no entertainments nor did it have any meetings for soeial purposes.

It is also contended on behalf of plaintiff that its corрorate character and nature for the purpose of applying the tax must be determined by its predominant or primary purpose, and some eases are cited with reference to altogether different tax provisions which support this view. For example, it is held that in classifying imported articles for the purpose of applying a tariff act the predominant use thereof should determine whether they come within the enumeratiоns of the act. But it will be observed that as respects the taxing act in question this construction is not in accordance with the regulations which, for reasons stated above, we think must be followed. Moreover, in applying customs duties, or as they are sometimes called “tariff taxes,” an article must be in one class or the other, otherwise the tax would be in some cases levied twice because the article belonged to two different classеs, or it would be in part exempted and in part taxable, which manifestly is not the intention of the law.

It is clear that under the regulations a club may be held to be social for the purposes of the act although its predominant рurpose is something else. Or, in other words, a club may be both social and civic or philanthropic.

The decision in the Army & Navy Club Case, 53 F.(2d) 277, 72 Ct. Cl. 684, is criticized because it held in effect that if the soeial features were an “essential” element of the activities оf the ‍​​‌‌‌​‌​‌‌​​​​​​‌‌‌‌​‌​​‌​‌‌​‌​‌​‌‌‌​‌‌‌‌‌‌‌‌​‌‌‍club they were not merely "incidental” to its predominant purpose, but the terms “essential” and “incidental” are so *937 (inconsistent in their meaning that we think this criticism is not well founded.

Our conclusion that the social features were a material purpose of the organization is based upon the fact that the club held many dances and other meetings solely for social purposes, that it conducted various kinds of entertainments and sporting contеsts, had and used elaborate facilities for recreation and entertaining ladies, together with other matters too numerous to set out here, and finally, as said in the case of Fisler v. United States, 66 Ct. Cl. 220, with reference to the soсial activities of the club: “It is probable that there are few clubs of a purely social nature anywhere in this country that make such elaborate provisions for social enjoyments.”

We have not mentioned speсifically the luxurious appointments and elaborate facilities of the club which must to some extent have contributed to the enjoyment of its members, for while much stress is laid thereon by counsel for defendant it is not necessary tо determine the weight to be given these matters except to say that to some extent they explain and amplify the evidence as to other matters. In order that the argument ‍​​‌‌‌​‌​‌‌​​​​​​‌‌‌‌​‌​​‌​‌‌​‌​‌​‌‌‌​‌‌‌‌‌‌‌‌​‌‌‍made on behalf of plaintiff might be fully understood, wе have set out in the findings more of the details established by the evidence than is usual and perhaps more than is proper in view of the rule that the decision of the ease must depend upon the ultimate fact which, as shown by thе findings, is that the social features were not merely incidental but were material, important, and necessary to the prosperity of the club.

Part of the dues which are sought to be recovered back were paid while thе club was in its temporary quarters awaiting the construction of the new building. While the club had during this period some facilities for recreation the testimony to which we have referred concerning the social activities of the сlub pertains to the period after it had occupied its new building. It is not urged on be- - half of plaintiff that there should be any separation of dues on this account, probably because the evidence shows clearly the purpose for which the new building was erected, which purpose was formed when the new budding was planned and there is no specific date that could be selected for such separation.

The Union League Club of Chicagо is a great organization. Its main or predominant purposes are not social but civic, philanthropic, charitable, and highly commendable; but in our opinion it cannot carry on all or nearly all of the social аctivities of a purely social club which provides social functions in a very extensive manner, without making itself liable to the tax, especially when its social activities constituted such an exceedingly important and material part of the life of the organization.

It follows from what has been stated above the plaintiff’s petition must be dismissed, and it is so ordered.