39 CFR 3055.30: Periodic reporting of service performance achievements.

For each Market Dominant product specified in the Mail Classification Schedule in part 3040, appendix A to subpart A of part 3040 of this chapter, the Postal Service shall file a Quarterly Report with the Commission addressing service performance achievements for the preceding fiscal quarter (within 40 days of the close of each fiscal quarter, except where otherwise specified by the Commission), except where otherwise specified by the Commission.