N.C. Gen. Stat. § 75-36: Certain contracts relating to toner or inkjet cartridges void and unenforceable as a matter of public policy.

Any provision in any agreement or contract that prohibits the reusing, remanufacturing, or refilling of a toner or inkjet cartridge is void and unenforceable as a matter of public policy. Nothing in this section shall prevent any maintenance contract that warrants the performance of equipment under the contract from requiring the use of new or specified toner or inkjet cartridges in the equipment under contract. (2003-386, s. 1.)