WASHINGTON, July 6 : The U.S. Supreme Court declined on Monday to block a Texas law requiring app stores and developers to verify the age of mobile device users, and for minors to obtain parental consent, to download apps or make purchases, acting in a challenge on free speech grounds by a technology industry group and students.The justices denied requests by the challengers to lift a lower court's decision that had allowed the law to take effect while litigation continues over whether it violates the U.S. Constitution's First Amendment, which protects against government abridgement of free speech.The Computer & Communications Industry Association, a group whose members include prominent app store operators such as Apple and Google, and a coalition of students called Students Engaged in Ad