(a) To improve the quality, accuracy, or completeness of the data or analysis of data contained in the Postal Service's annual periodic reports to the Commission, the Commission, acting on its own behalf, may issue a notice of proceeding to change an accepted analytical principle. In addition, any interested person, including the Postal Service or a public representative, may submit a petition to the Commission to initiate such a proceeding.

(b) Form and content of notice or petition. The notice of proceeding or petition shall identify the accepted analytical principle proposed for review, explain its perceived deficiencies, and suggest how those deficiencies should be remedied.

(1) If the notice of proceeding or petition proposes that a specific alternative analytical principle be followed, it should include the data, analysis, and documentation on which the proposal is based, and, where feasible, include an estimate of the impact of the proposed change on the relevant characteristics of affected postal products, including their attributable cost, avoided cost, average revenue, or service attainment.

(2) If the petitioner requests access to data from the Postal Service to support the assertions or conclusions in its petition, and such data are not otherwise available, it shall accompany the petition with a request to gain access to such data. The petitioner's request should identify the data sought, and include the reasons for believing that the data will support its petition. To expedite its evaluation of the data request, the Commission may, after reasonable public notice, order that answers or objections be presented orally or in writing.

(c) Procedures for processing a notice or petition. To better evaluate a notice or petition to change an accepted analytical principle, the Commission may order that it be made the subject of discovery. By request of any interested person, or on its own behalf, the Commission may order that the petitioner and/or the Postal Service provide experts on the subject matter of the proposal to participate in technical conferences, prepare statements clarifying or supplementing their views, or answer questions posed by the Commission or its representatives.

(d) Action on the notice or petition. (1) After the conclusion of discovery procedures, if any, the Commission shall determine whether to issue a notice of proposed rulemaking based on the petition and the supporting material received. Such notice shall be evaluated by procedures that are consistent with 5 U.S.C. 553. Interested parties will be afforded an opportunity to present written comments and reply comments, and, if the Commission so orders, to present oral comments as well.

(2) If accepted by the Commission, the change proposed in the notice of proposed rulemaking shall be published in a final rule in the Federal Register and on the Commission's website.