45 before POL - what happens if the next sector give continuous descent so they do not actually "level", you didn't say "on passing level". I know it is pedantic, but search other threads on here and you will see that there are those out there that will use that to their own advantage, and I have seen it once in real life. It only takes one numpty.......
That is why I teach "when passing <point>" or "250kts at or below FL***"