The reason why it is funny is that almost by definition, anything that a biometric data detectors could detect would fall under the banned category. A bio-metr

The reason why it is funny is that almost by definition, anything that a biometric data detectors could detect would fall under the banned category. A bio-metrics detector, detects biometrics! And the law basically bans bio metrics detectors from detecting biometrics. It would be like if there was a law that said that restaurants can't sell food. Or if hammer regulations prevented hammers from being used on nails. Or that water could be used for anything but making things wet or drinking. It is almost definitionally contradictory. That is indeed funny.