In our state, that registration sticker has always had a seven-digit number printed on it. To find out if a registration sticker belonged on a particular plate, the police would have to enter that seven-digit number into a database search. This was not convenient, especially since it appeared that there were some individuals who pilfered stickers, instead of paying their renewal fees.
So, we were pleased to note that our new sticker bears, as its sticker number, not some "random" seven-digit number, but rather the license plate number! It matches!
Much more sensible.
However, as we have argued before, it would be even more sensible to abolish not just the registration sticker number, but also the license plate number. They could both be replaced with the driver's cellphone number – and this would make our roads much safer and more courteous.