D. C. W. D. Tex. [Probable jurisdiction noted, 464 U. S. 812.] Cases restored to calendar for reargument. In addition to the questions presented in the jurisdictional statements and previously briefed [*1214] and argued, the parties are requested to brief and argue the following question: “Whether or not the principles of the Tenth Amendment as set forth in National League of Cities v. Usery, 426 U. S. 833 (1976), should be reconsidered?”