476.4A  Exemption from tariff filings for telephone utilities.
  Notwithstanding contrary provisions of this chapter, a telephone utility may offer centron, centrex, intraexchange private line, or multiline variety package service without filing a tariff unless the board determines such a procedure is not in the public interest. The telephone utility shall offer each service which is exempt from a tariff filing at a rate which exceeds the cost of the service. A telephone utility offering its services without filing a tariff shall not discriminate in an unreasonable manner for or against any customer.
  A telephone utility shall provide the board with at least thirty days notice prior to a request to offer service without filing a tariff. The board may require the telephone utility to file its price lists, contracts, or cost allocations for services offered without a tariff. Any such price lists, contracts, or cost allocations so filed shall be afforded rebuttable presumptions that they meet the requirements of section 22.7, subsection 6.
  The board shall consider the revenues, expenses and investment related to telephone utility services offered without a filed tariff in proceedings under section 476.3, 476.6 and 476.7.
84 Acts, ch 1267, §1