N.C. Gen. Stat. § 105-564
The Authority shall retain the net proceeds of taxes it collects under this Article. Taxes collected by the Division of Motor Vehicles under this Article shall be credited to a special fund and the net proceeds disbursed quarterly to the appropriate Authority. Interest credited to the fund shall be disbursed quarterly to the Highway Fund to reimburse the Division of Motor Vehicles for the cost of collecting and administering the tax.
An Authority that levies a tax under this Article may use the proceeds of the tax for any purpose for which the Authority is authorized to use funds. An Authority shall use the tax proceeds to supplement and not to supplant or replace existing funds or other resources for public transportation systems.
N.C. Gen. Stat. § 105-564