Any proposal to implement a tariff change other than in rate level must comply with subparts A, B, and C of this part.

Agreements intended to effect a change or revision of an executed service agreement on file with the Commission must be in the form of a superseding executed service agreement only. Service agreements may not contain any supplements, but may contain exhibits which may be separately superseded. The exhibits may show, among other things, contract demand delivery points, delivery pressures, names of industrial customers of the distributor-customer, or names of distributors (with one distributor named as agent where delivery to several distributors is effected at the same delivery points).

When an effective tariff, contract, or part thereof on file with the Commission, is proposed to be canceled or is to terminate by its own terms and no new tariff, executed service agreement, or part thereof, is to be filed in its place, the natural gas company must notify the Commission of the proposed cancellation or termination , at least 30 days prior to the proposed effective date of such cancellation or termination. With such notice, the company must submit a statement showing the reasons for the cancellation or termination, a list of the affected customers and the contract demand provided to the customers under the service to be canceled. A copy of the notice must be duly posted tariff filing in the electronic format required by § 154.4.

Whenever the tariff or contracts of a natural gas company on file with the Commission is to be adopted by another company or person as a result of an acquisition, or merger, authorized by a certificate of public convenience and necessity, or for any other reason, the succeeding company must file with the Commission, and post within 30 days after such succession, a tariff filing in the electronic format required by § 154.4 bearing the name of the successor company.