Robert Kelner is quoted in an NPR article regarding enforcement of the Foreign Agents Registration Act (FARA). According to Kelner, the cases that have been prosecuted "usually are prosecuted because they involve something other than a FARA violation occurring at the same time." He adds, "The statute itself is extremely vague: It contains a number of terms that are not well-defined. There's very little case law interpreting it." He says, "There's been a lot of confusion about what it means and very, very little enforcement and that tends to lead to an atmosphere in which lots of firms don't pay very close attention to a statute that they don't understand."