From Keep North Carolina Beautiful:
You can now support a Litter-Free N.C. with the Purchase of a Specialty Plate. Plates require a $20 annual fee in addition to the regular license payment.
The plate can be personalized but only has four spaces available due to the “do not litter” symbol taking up three spaces. A portion of the $20 from each plate sold will be allocated to the NC Department of Transportation for litter reduction efforts.