How about the seat belt requirement -

"1. SFI 16.1 or SFI 16.5, incorporated herein by reference
and available at http://www.s
fi foundation.com, seat
belts shall be valid for two years from the month and year
punched or indicated on the SFI tag. There shall be one
original tag attached to one of the two shoulder belts, one
original tag attached to one of the lap belts, and a third
original tag attached to the crotch belt."


GCR states two years from the last day of the year stamped..... Also, I have belts that have a tag on only the lap belt, not the shoulder harness or the submarine strap.