In my major, there's a higher term course that can be taken by freshmen, and there's that can't.
Especially when the course is numbered or need a pass grade from the course before that.
But there's no way a freshmen in his first semester is allowed to take a higher course, because the first semester course is like a package that given by university.
Seeing I'm from science major, I don't know what happened in other major but taken by their conversation it's not supposed to be allowed to in their major.
I think intentionally or not, she's taken the opposing role, so that it didn't became a resentment from other upper classmen.
I think it's more of a resentment thing. The professor explained that he is also enrolled in prerequisite course. I have also seen this happen a couple of times. I know little about other universities, but I was an incoming freshman that was allowed to take higher level courses. I have also seen many other incoming freshman across various departments do the same. I'm not sure about law school, but it doesn't seem like he is skipping all of his freshmen courses. He is just dual enrolled in a prerequisite course and a higher level course. This is tricky and hard to do, but I have seen it successfully done. Some people are able to graduate early because of taking courses early and various other exceptions.
I'm not completely sure about other countries, but in the U S, a permit or professor's permission can be accepted in place of prerequisites. I know some freshmen (1st years) who took sophomore, junior, and senior (2nd, 3rd, 4th year) level courses . I also knew a girl who took graduate level courses as a junior. In her case, it took a lot of emails, testing, recommendations, and more. The courses you take in high school can also be a big factor. I took advance placement and dual enrollment courses in high school. I also took the placement test for certain courses. This allowed me to take sophomore and junior level courses as a freshman. My situation is different, but my point is that freshman can and do take higher level courses in college and university.