German men need military permit for extended stays abroad

The new military service law requires all men under 45 to seek approval from the Bundeswehr to leave the country for longer than three months. It also obliges the military career center to issue it.

Deutsche Welle

Most important part:

When asked, the ministry spokesperson pointed out that "the regulation was already in place during the Cold War and had no practical relevance; in particular, there are no penalties for violating it.”

Why introduce it then?