First, it would have limited the remedies for violation of Establishment Clause rights under the United States Constitution to injunctive relief and declaratory relief only. Second, it would have prevented a plaintiff in such a case from recovering attorneys' fees when they win their case.
This idea would have restricted the remedies available to individuals whose rights under the First Amendment (specifically, the Establishment Clause) were violated to only injunctions and declaratory judgments. It would also have barred plaintiffs from recovering legal fees if they won a case related to these violations.