If your license plate frame covers any or all of your registration sticker, registration month sticker or the words North Carolina, it's illegal.
The frames are usually advertising car dealers, showing off favorite sports teams or just decorating your car.
Some drivers say they did not know about the law.
"I was not aware of that," Raleigh resident Kelly Braam said.
And many car owners say they will make changes to their plate before the law passes.
"I do need to change it within the next couple of days," Durham resident Brian Daniels said.
"I just realized that and so I'm going to have to fix that when I get home," Bunn resident Terry Anderson added.
The new law is thanks in part to the law enforcement lobby. Officers want to be able to easily read a plate and call it in before approaching a driver.
"That puts our officers in a dangerous spot," Raleigh Police Department Lt. Tim Tomczak said.
Tomczak with Raleigh PD says the $100 fine might not seem like much, but it might end up costing drivers even more.
"Maybe having a partially covered license plate is a good reason to stop a car and they find something a little bit bigger and better inside," he said.
However, some commuters are complaining that the government is just taking away another citizen's right, but Daniels says there are more important things to worry about.
"It makes sense," he said. "I understand, it may cause some minor changes in my household, but that's okay."