39 C.F.R. § 601.105 Business relationships.
Title 39 - Postal Service
A person or organization wishing to enjoy a continuing business relationship with the Postal Service in purchasing matters is expected to treat the Postal Service in the same manner as it would other valued customers of similar size and importance. The Postal Service reserves the right to cease accepting or considering proposals from a person or organization when that person or organization fails to meet reasonable business expectations of high quality, prompt service, and overall professionalism.
Title 39: Postal Service
PART 601—PURCHASING OF PROPERTY AND SERVICES
§ 601.105 Business relationships.
