S.C. Code § 12-37-2865
Seventy-five percent of the revenues from the road use fee assessed pursuant to Section 12-37-2850, and the one-time fee assessed pursuant to Section 12-37-2860 must be distributed by the State Treasurer as provided in Section 12-37-2870. Distributions must be made by the last day of the next month succeeding the month in which the fee is paid. The remaining twenty-five percent must be credited to the Infrastructure Maintenance Trust Fund to be used to finance expansion and improvements to existing mainline interstates.
S.C. Code § 12-37-2865
2017 Act No. 40, Sections 8.L, 8.M, provide as follows:
"L. (1) Notwithstanding any provision to the contrary within this SECTION, a person who registers a vehicle for use in this State pursuant to Article 23, Chapter 37, Title 12, as amended by this act, must register his vehicle during calendar year 2019 and is required to pay the road fees calculated based on the fair market value of the vehicle as specified in Sections 12-37-2820 and 12-37-2850 at the time the vehicle's registration fees are paid.
"(2) Notwithstanding the provisions in Section 12-37-2865(B) and (C), as contained in this SECTION, to the contrary, during calendar year 2019, the first four hundred thousand dollars of fee revenue collected pursuant to Section 12-37-2865 must be retained by the Department of Motor Vehicles to defray programming costs.
"(3) The initial millage required by Section 12-37-2850 must be calculated on or before June 1, 2018.
"M. This SECTION takes effect January 1, 2019, except that the Department of Revenue, in consultation with the Revenue and Fiscal Affairs Office, shall calculate the millage to be used to calculate the road use fee provided in Section 12-37-2850 by July 1, 2018."