In "Craig v. Boren", a liquor vendor and a young man challenged the constitutionality of an Oklahoma statute that prohibited the sale of 3.2% beer to males under 21 years of age and females under 18 years of age. The Court held that the liquor vendor, subject to sanctions and loss of license for violation of the statute, was a proper party in interest to object to the enforcement of the allegedly discriminatory law, because obedience to the law would cause loss of sales and disobedience risked sanctions from the state. "Accordingly," the Court explained, "vendors and those in like positions have been uniformly permitted to resist efforts at restricting their operations by acting as advocates of the rights of third parties who seek access to their market or function." It is crucial to the vendor's standing that its failure to prevail in the litigation "will materially impair the ability of males 18-20 years of age to purchase 3.2% beer despite their classification by an overt gender-based criterion."