39 CFR §3055.90

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 report as part of the section 3652 report, unless a more frequent filing is specifically indicated, addressing customer satisfaction achievements for the preceding fiscal year. The report shall include, at a minimum, the specific reporting requirements presented in §§ 3055.91 through 3055.92.