March 27, 1995
The United States Postal Service, with the concurrence of the Office of Government Ethics (OGE), proposes to issue regulations applicable to employees of the Postal Service to supplement the Standards of Ethical Conduct for Employees of the Executive Branch issued by OGE. The proposed rule, which addresses ethical issues unique to the Postal Service, would prohibit certain outside activities and would require prior approval for employees to engage in other specified outside employment or activities.
https://www.govinfo.gov/content/pkg/FR-1995-03-27/pdf/95-7469.pdf