(a) Supporting justification for changes to a product description in the Mail Classification Schedule shall include a description of, and rationale for, the proposed changes to the product description; and the additional material in paragraphs (b) and (c) of this section.
(b)(1) As to market dominant products, explain why the changes are not inconsistent with each requirement of 39 U.S.C. 3622(d) and part 3010 of this chapter; or
(1) As to market dominant products, explain why the changes are not inconsistent with each requirement of 39 U.S.C. 3622(d) and part 3010 of this chapter; or
(2) As to competitive products, explain why the changes will not result in the violation of any of the standards of 39 U.S.C. 3633 and part 3015 of this chapter.
(c) Describe the likely impact that the changes will have on users of the product and on competitors.