Mo. Rev. Stat. § 392.480: Services to be offered under tariff.

Except as provided in section 392.520, all telecommunications services offered or provided by telecommunications companies shall be offered under tariff and classified as either competitive, transitionally competitive, or noncompetitive telecommunications services, subject to proper certification and other applicable provisions of this chapter. Any tariff filed with the commission shall indicate whether the telecommunications service to be offered or provided is competitive, transitionally competitive, or noncompetitive.