OPINION OF THE COURT
Cardona, P. J.New York imposes sales and excise taxes upon cigarettes and motor fuel (see, Tax Law arts 12-A, 20, 28), but cannot *340impose such taxes on sales of those products to enrolled tribal members on Indian reservations (see, Moe v Salish & Kootenai Tribes, 425 US 463). On-reservation sales to non-Indian consumers, however, are subject to such taxation (see, Washington v Confederated Tribes, 447 US 134). In 1988, respondent Department of Taxation and Finance adopted regulations (see, 20 NYCRR 336.6, 336.7, 414.6, 414.7) designed to require on-reservation retailers to pay sales and excise taxes upon sales of cigarettes and motor fuel to non-Indian consumers. Cigarette wholesalers doing business on Indian reservations commenced actions to enjoin the State’s regulatory scheme (see, 20 NYCRR 336.6, 336.7) to enforce the collection of sales taxes on cigarettes; however, the actions culminated in a decision by the United States Supreme Court in June 1994 (see, Department of Taxation & Fin. v Milhelm Attea & Bros., 512 US 61) upholding the State’s regulations.
Nevertheless, according to the petition herein, respondent Commissioner of Taxation and Finance has failed to enforce said statutes and regulations. As a consequence, petitioners, trade organizations representing convenience stores and corporations owning and operating retail stores in New York engaged in, inter alia, the sale of cigarettes and motor fuel, commenced this CPLR article 78 proceeding seeking to compel respondents to determine, assess and collect cigarette and motor fuel excise and sales taxes relating to sales of those products by on-reservation retailers to non-Indian consumers and otherwise enforce the laws on a uniform basis. Respondents moved to dismiss the petition on the ground that petitioners lack standing to maintain the proceeding, which motion was denied. Thereafter, respondents answered, interposing objections in point of law. Supreme Court treated such objections as a motion for summary judgment and, inter alia, granted the petition in all respects. Respondents appeal.
The essential principle of standing is the notion of "injury in fact — an actual legal stake in the matter being adjudicated [which] ensures that the party seeking review has some concrete interest in prosecuting the action which casts the dispute 'in a form traditionally capable of judicial resolution’ ” (Society of Plastics Indus. v County of Suffolk, 77 NY2d 761, 772, quoting Schlesinger v Reservists to Stop the War, 418 US 208, 220-221), which is "fairly traceable to the defendant’s acts or omissions” (Arlington Hgts. v Metropolitan Hous. Corp., 429 *341US 252, 261). The crux of petitioners’ argument is that by failing to enforce the subject taxing statutes against on-reservation retailers, State officials are permitting those retailers, with whom petitioners must compete, to purchase cigarette and motor fuel products at lower wholesale prices, which in turn enables them to charge "discount” prices to non-Indian consumers, a fact which respondents have not seriously disputed. We note that the United States Supreme Court has found such competitive economic injury cognizable (see, Clarke v Securities Indus. Assn., 479 US 388, 403; Arnold Tours v Camp, 400 US 45, 46; Data Processing Serv. v Camp, 397 US 150, 151; cf., In re United States Catholic Conference, 885 F2d 1020, 1029, cert denied sub nom. Abortion Rights Mobilization v United States Catholic Conference, 495 US 918). Accordingly, we find that petitioners have asserted sufficient injury in fact for standing purposes. The determination of standing, however, requires more than a showing of a cognizable injury in fact.
To the principle of injury in fact, courts at both the State and Federal levels have added a rule of self-restraint or "prudential limitation[ ]” (Society of Plastics Indus. v County of Suffolk, 77 NY2d 761, 773, supra), that the interest or injury asserted must fall within "the zone of interests to be protected or regulated by the statute or constitutional guarantee in question” (Data Processing Serv. v Camp, supra, at 153 [emphasis supplied]). Thus, as the Court of Appeals has noted, "competitive injury, of itself, will not confer standing” (Matter of Dairylea Coop. v Walkley, 38 NY2d 6, 11). The competitive injury must be tiéd either to a statutory purpose, as it was in Matter of Dairylea Coop. v Walkley (supra),1 or to a violation of a constitutional guarantee, as is the case here.
In arguing that petitioners lack standing to maintain this proceeding because they are not within the "zone of interests” intended to be protected by the tax laws (see, Tax Law arts 12-A, 20, 28) and regulations (see, 20 NYCRR 336.6, 336.7, 414.6, 414.7), respondents misconstrue the nature of petitioners’ challenge. Petitioners are not contesting the validity of the subject taxing statutes or an administrative determination rendered in violation of those statutes. Rather, petitioners challenge respondents’ unequal enforcement of the statutes *342and regulations. Petitioners argue, inter alia, that by their failure to uniformly enforce the mandated collection of taxes, respondents have engaged in discrimination violative of their right to equal protection as guaranteed by the Fourteenth Amendment of the US Constitution.2 Thus, for standing purposes, we must decide whether petitioners’ injury falls within the zone of interests sought to be protected by that constitutional guarantee.
The Equal Protection Clause prohibits a public authority from applying or enforcing an admittedly valid law in a discriminatory fashion between persons in similar circumstances (see, Yick Wo v Hopkins, 118 US 356, 373-374; Matter of 303 W. 42nd St. Corp. v Klein, 46 NY2d 686, 693). In the case before us, it is clear that the failure to enforce the collection of sales and excise taxes on cigarettes and motor fuel sold by on-reservation retailers to non-Indian consumers has resulted in the unequal application of the taxing statutes and regulations to petitioners, who by statute (see, Tax Law arts 12-A, 20, 28), regulation (see, 20 NYCRR 336.6, 336.7, 414.6, 414.7) and case law (see, Department of Taxation & Fin. v Milhelm Attea & Bros., 512 US 61, supra) are entitled to be treated alike (see, Matter of Di Maggio v Brown, 19 NY2d 283, 290).3
Although " '[t]he conscious exercise of some selectivity in enforcement is not in itself a federal constitutional violation’ ” (supra, at 290, quoting Oyler v Boles, 368 US 448, 456; see, Matter of 303 W. 42nd St. Corp. v Klein, 46 NY2d 686, 695, supra), when it is demonstrated, as it has been here, that the selection is based upon a suspect classification such as race, " 'a State must show that its purpose or interest is both constitutionally permissible and substantial, and that its use of the classification is "necessary * * * to the accomplishment” of its purpose or the safeguarding of its interest’ ” (Regents of Univ. of Cal. v Bakke, 438 US 265, 305, quoting In re Griffiths, 413 US 717, 721-722). Respondents argue that nonenforcement of the tax*343ing statutes against on-reservation retailers has been necessary "to ensure an opportunity for reservation businesses to survive, and to avoid disruptive and potentially violent demonstrations’ ’ while they negotiate a diplomatic solution to the problem of collecting taxes from Indian nations and tribes protective of their sovereign status.
Referring to the first proffered reason, we note that it is not constitutionally permissible to "[p]refer[ ] [the] members of any one group for no reason other than race or ethnic origin [for, to do so,] is discrimination for its own sake” (Regents of Univ. of Cal. v Bakke, 438 US 265, 307, supra). As for the second reason, we acknowledge that protecting citizens from civil disorder is within the legitimate police power of the State (see, Stotland v Pennsylvania, 398 US 916, 920 [Douglas, J., dissenting]), but note that the exercise of that power is never paramount to the right of equal protection, save in those rare instances where civil disorder "threaten[s] the very existence of the State” (supra, at 920).
Based upon the above analysis, it is our view that the denial of equal treatment establishes petitioners’ standing in this equal protection case (cf., Northeastern Fla. Ch. of Associated Gen. Contrs. v City of Jacksonville, 508 US 656).4
With respect to the merits, mindful that "[t]he burden of proving a claim of discriminatory enforcement is a weighty one” (Matter of 303 W. 42nd St. Corp. v Klein, supra, at 694), we nevertheless are satisfied that petitioners have met their burden as a matter of law. They have shown, upon the record before this Court, that "a grossly disproportionate incidence of nonenforcement against others similarly situated” exists5 and that "the only reasonable explanation for the pattern of *344[nonjenforcement” (supra, at 695) is a discriminatory purpose on the part of respondents, which, even though intended as benign (see, Regents of Univ. of Cal. v Bakke, 438 US 265, 294, supra), is based upon the impermissible standard of race.
We turn next to respondents’ contention that Supreme Court abused its discretion in ordering, albeit as alternative relief,6 the State-wide suspension of respondents’ collection and enforcement of the sales and excise taxes on motor fuel and tobacco. While it is arguably true that petitioners’ right to equal treatment can be attained either by requiring the collection and enforcement of the subject tax laws and regulations against on-reservation retailers or suspending collection and enforcement State-wide,7 petitioners’ demand for relief in their petition was limited to the former. Therefore, it was error for Supreme Court to have awarded such sweeping, undemanded relief without adequate notice of its intent to do so (see, Matter of We’re Assocs. Co. v Scaduto, 206 AD2d 245).
. In Dairylea, the Court of Appeals stressed that the milk dealer’s standing to challenge administrative action, which extended the license of a competitor into its sales area, did not derive from competitive injury alone but from the overriding legislative purpose of the statute in question, which was the prevention of destructive competition in the milk industry.
. We note in passing that it does not appear that the local municipalities which border the Indian nations or any other government entity, such as the Comptroller, possess a substantial relationship with petitioners sufficient to entitle them to raise petitioners’ equal protection claims (see, Holland v Illinois, 493 US 474, 489; Singleton v Wulff, 428 US 106, 114-115; People v Kern, 149 AD2d 187, 233, affd 75 NY2d 638, 654, n 3).
. Notably, "[b]y whom, when and through what procedure or remedy, taxes shall be collected is a matter for legislative determination, subject to the rule that the procedure cannot be utterly unreasonable or arbitrary or unequal and unjust in its operation” (Gautier v Ditmar, 204 NY 20, 28 [emphasis supplied]).
. We note that Supreme Court grounded its determination of standing upon the Court of Appeals decision in Matter of Dudley v Kerwick (52 NY2d 542). In that case, the Court implicitly granted standing, without addressing the issue, when it upheld a real property taxpayer’s right to challenge, in a CPLR article 78 proceeding, the action of a local assessor in granting wholesale religious exemptions to 88% of a town’s landowners. While it can be argued that the type of inaction on the part of the State in the subject ease is different from the governmental action challenged in Dudley (see, supra; see also, Matter of New York State Assn. of Tobacco & Candy Distribs. v New York State Tax Appeals Tribunal, 159 AD2d 132), we do not need to consider the import of Dudley in the case at hand due to our conclusion that petitioners have satisfied the traditional "zone of interest” test.
. We note that respondents’ submissions in this record, particularly the "Important Notice N-94-16”, establish their awareness of the deliberate nonenforcement of the tax collection laws on the Indian reservations; although respondents intended to implement enforcement on December 1, *3441994, it is clear that no enforcement occurred prior to the argument of this appeal.
. Supreme Court allowed respondents 120 days, which they indicated would be necessary, to implement and enforce the subject tax laws and regulations equally on all to whom they were applicable.
. We note the possibility of an alternative means (other than the current regulatory systems) which may provide petitioners with the level "playing field” they seek for sales to non-Indian consumers. "States may * * * enter into agreements with the tribes to adopt a mutually satisfactory regime for the collection of [sales and excise] tax[es]” (Oklahoma Tax Commn. v Potawatomi Tribe, 498 US 505, 514). While this Court understands that the State has been engaged in negotiations of this nature, this court is bound by the record before it.