There is no law, but is it assumed there is a secret agreement with the government https://en.m.wikipedia.org/wiki/Printer_tracking_dots#:~:text=In%202005%2C%20

There is no law, but is it assumed there is a secret agreement with the government https://en.m.wikipedia.org/wiki/Printer_tracking_dots#:~:text=In%202005%2C%20the%20civil%20liberties,happy%20to%20publish%20that%20here.) https://en.m.wikipedia.org/wiki/Printer_tracking_dots#:~:tex...