CFR›Title 39›Chapter III›Part 3040›Subpart F ContainsSections 3040.210–3040.212CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart F—Size and Weight Limitations for Mail Matter Sections 3040.210 § 3040.210 General. 3040.211 § 3040.211 Limitations applicable to market dominant mail matter. 3040.212 § 3040.212 Limitations applicable to competitive mail matter. Previous E Subpart E—Requests Initiated by the Postal Service To Make Material Changes or Minor Corrections to the Mail Classification Schedule Next G Subpart G—Requests for Market Dominant Negotiated Service Agreements