Seat belt slack rule?

I heard something about CP having a new ruler, that in order for an individual to ride, there must be at least an inch of slack in the seat belt. Just wondering if anyone else had heard this, or anything.

http://www.pointbuzz.com/cpplace.aspx?mode=thread&TopicID=14332

There is a lot of talk about it going on now in the Millennium Force section, check there.