Enacts new GS 97-6.1 requiring sole proprietors performing any work to maintain a workers' compensation insurance policy, even if the sole proprietor employs no other employees. Failure to comply estops the sole proprietor from making a claim on another person's workers' compensation insurance policy. Makes conforming changes to the definition of employee in GS 97-2 and defines sole proprietor as an individual who (1) does not employ any other individuals in the business, whether the business is incorporated or unincorporated, (2) solely owns the business by himself or herself, and (3) operates as an independent contractor.