So, my California tags expired at midnight on July 31. When I got to my car the next morning, I had a ticket. The officer gave me the ticket in the middle of the night at 1:45 am. So that day, a Wednesday, I went to the DMV, which stayed open till 7 pm. I thought that my CA car registration would suffice for registering my car in Il. When I got there I discovered that I needed to have proof of ownership, which meant my loan paper work. So couldn't take care of my car that day.
Went back on Friday afternoon, later that week, I got to the DMV 10 minutes before they closed, where I discovered they didn't take Credit Cards. Only checks or cash or Discover. Who carries checks anymore??
So I left and that Saturday got my second ticket. Tried to leave the office early the following Monday and Tuesday, which didn't work. Then I left work to get there before they closed at 7pm, but didn't make it because of the horrible traffic that night. So finally, Thursday, at lunch I raced there and managed to finally get my license plates! And then finally today I got them on my car. It only took me 14 days.
Now I'm going to contest my tickets. You only need to register cars that are moving and my car wasn't moving at the time I received the tickets. It was in the middle of the night.