Appellee instituted this suit for a declaratory judgment that a 1956 Mississippi statute imposing a charge on public utilities for the use of public streets and places does not apply to it, and, if it does, violates the Federal and State Constitutions. It was tried before a single district judge. After trial the district judge wrote an opinion (
Proper exercise of federal jurisdiction requires that controversies involving unsettled questions of state law be decided in the state tribunals preliminary to a federal court’s consideration of the underlying federal constitutional questions. See
Railroad Comm’n
v.
Pullman Co.,
The judgment of the Court of Appeals is vacated and the cause is remanded to the District Court for proceedings in conformity with this opinion.
