German source: "Die Kontrolle soll stattdessen nur noch nachlaufend durch ein neues Spezialgremium erfolgen." https://www.heise.de/newsticker/meldung/NSA-Skandal-und-BND-...
Update: the existing control committees for G10 (article 10 of Grundgesetz = German constitution) are staffed with members of the parliament and one has to be lawyer. I don't think that makes it a court, maybe it's just a matter of translation.
German source on G10 committees https://de.wikipedia.org/wiki/Artikel_10-Gesetz#Verfahren
translates to (while keeping the sentence structure the same as much as possible, even if that sounds a bit off in english):
"The, in place of judicial review of the factual matter, arranged political control committees have shown in the past to often be insufficient:"