As previous posters have mentioned, what was then known as a Class 4 Instrument Rating or Night VMC used to be a requirement for the CPL.
No idea why it was dropped as a requirement and consider it a retrograde step M'self.
It was handy for me anyway one time when my MEIFR rating had expired and I had to do some firespotting for the local CFS.
If I recall correctly, if your CPL IFR expires, you had better have an entry in your log book for the required night cross country
Think you are correct on that.