U.S. Code / Title 39 — Postal Service / Part IV—Mail Matter / Chapter 36—Postal Rates, Classes, and ServicesTitle 39SubchapterSubchapter Ii—Provisions Relating to Competitive ProductsContents§ 3631. Applicability; definitions and updates§ 3632. Action of the Governors§ 3633. Provisions applicable to rates for competitive products§ 3634. Assumed Federal income tax on competitive products income