In practice, I agree it is false because the border immigration agent doesn’t check. But i have seen things like this (screenshot)
Suggesting that the law may be different.
I admit to not knowing the cite-able statute.
. .
Also, below is a link to another post with @AvaiVayayana that discusses this question, hence what I mean by “it is sometimes mentioned”, i.e. i do not know the law, application, and actual practice, but at least a few places don’t believe it is 100% false.