Frankenjura has an established zone concept regulating whether a rock is allowed and if yes, how: https://ig-klettern.org/naturschutz/zonierungen/
For seasonal closures of crags, see: https://ig-klettern.org/naturschutz/aktuelle-sperrungen/
For bouldering, check first: https://ig-klettern.org/klettern/wissenswertes/boulderappell/. Especially, no publishing of boulders, and no bouldering after sunset.