Is it true that in Italy bidet is mandatory by law? Yes: by law, at least one of the bathrooms in the house must have it.
This is stated in the Ministerial Decree of 5 July 1975, which imposes an obligation for each house to build at least one bathroom equipped with this sanitary, along with toilet, shower/bathtub and sink.
So only the service bathroom can be free of bidet. The other, no.
