South carolina constitution
Article X: finance, taxation and bonded debt
Section 12

No law shall be enacted permitting the incurring of bonded indebtedness by any county for sewage disposal or treatment, fire protection, street lighting, garbage collection and disposal, water service or any other service or facility benefitting only a particular geographical section of the county unless a special assessment, tax or service charge in an amount designed to provide debt service on bonded indebtedness or revenue bonds incurred for such purposes shall be imposed upon the area or persons receiving the benefit therefrom.