I've had a quick look and I can't see that this is actually required, it's forcing the default behaviour and I can't see that the behaviour has been overridden previously in the cascade. This is also not something I've seen before in common print styles. 

In short I think the behaviour will be the same without the !important and most likely without the rules of 161-167 at all (though it would be prudent to test that of course.)

@zaridan Agreed, if it can be avoided at all it should be.