Validation stamps.
Validation stamps. International Certificates of Vaccination against cholera and yellow fever issued for vaccinations performed in the United States shall be validated by:
(1) The Seal of the Public Health Service; or
(2) The Seal of the Department of State; or
(3) The stamp of the Department of Defense; or
(4) The stamp issued to the National Aeronautics and Space Administration; or
(5) The stamp issued by a State or territorial health department; or
(6) An official stamp of a design and size approved by the Director for such purpose.