§ 301-53.1 Using promotional benefits from travel service providers.
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
Promotional benefits or materials, such as frequent flyer miles may be retained for subsequent official travel or for personal use if such items are obtained under the same conditions as those offered to the general public and at no additional cost to the Government. If an employee is offered such benefits in connection with planning an official conference or other group travel, they are considered property of the Government and cannot be retained for personal use, but may be accepted on behalf of the Government for use on official travel.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.