Exemptions.

(a) Gross charges from the sale, by any toll or wireless telecommunication company, of toll telecommunication or District-based wireless telecommunication service for resale to any other toll or wireless telecommunication company or public utility subject to tax under this chapter or § 47-2501 shall be exempt from taxation under this chapter. (b) Gross charges from the sale, by any public utility of utility service for resale to a toll telecommunication or wireless telecommunication company subject to tax under this chapter shall be exempt from taxation under § 47-2501 .